python-distutils-extra doesn't honor --prefix for installing dbus service files

[Hedayat Vatankhah]

I tried to install a package into a directory using './setup.py install --prefix /my/install/prefix', it installed all files into this directory except a dbus configuration files, which it tries to install into /etc/dbus-1/system.d instead of /my/install/prefix/etc/dbus-1/system.d

Looks like that it can be fixed by replacing:
        v.append(('/etc/dbus-1/system.d/', dbus_conf))

with
        v.append(('etc/dbus-1/system.d/', dbus_conf))
(removing the leading '/')

[Hedayat Vatankhah (hedayat-fwd+launchpad)]

Well, maybe I just confused --prefix with --root