Thank you Gino, it works fine :

root@s1:~# patch -p1 < patch.diff
root@s1:~# /var/lib/dpkg/info/dahdi-dkms.postinst configure
Removing old dahdi-2.5.0.1+dfsg-1ubuntu3 DKMS files...

------------------------------
Deleting module version: 2.5.0.1+dfsg-1ubuntu3
completely from the DKMS tree.
------------------------------
Done.
Loading new dahdi-2.5.0.1+dfsg-1ubuntu3 DKMS files...
First Installation: checking all kernels...
Building only for 3.13.0-27-generic
Building for architecture x86_64
Building initial module for 3.13.0-27-generic
Done.

dahdi_dummy:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_dynamic_eth.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_dynamic.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_dynamic_loc.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_echocan_jpah.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_echocan_kb1.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_echocan_mg2.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_echocan_sec2.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_echocan_sec.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_transcode.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

pciradio.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

tor2.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wcb4xxp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wcfxo.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wct1xxp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wct4xxp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wctc4xxp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wctdm.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wctdm24xxp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wcte11xp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wcte12xp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

xpd_fxo.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

xpd_fxs.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

xpd_pri.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

xpp.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

xpp_usb.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

xpd_bri.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_voicebus.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

opvxa1200.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

wcopenpci.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_echocan_oslec.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

echo.ko:
Running module version sanity check.
Error! Module version 0.3.0 for echo.ko
is not newer than what is already found in kernel 3.13.0-27-generic (0.3.0).
You may override by specifying --force.

zaphfc.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

dahdi_vpmadt032_loader.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

ap400.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

opvxd115.ko:
Running module version sanity check.
 - Original module
   - No original module exists within this kernel
 - Installation
   - Installing to /lib/modules/3.13.0-27-generic/updates/dkms/

depmod.......

DKMS: install completed.
root@s1:~#