Centrifydc bad lib64 path on 5.1.0-497 update for 64-bit.

[Steve Clark]

While upgrading centrifydc from version 4.4.3-464 to 5.1.0-497 on Ubuntu 12.04 64-bit the update fails and centrify no longer functions.

I found that while scripts in /usr/bin like adinfo have LD_LIBRARY_PATH configured to /usr/share/centrifydc/lib64 that the actual symlink was renamed to lib64.old. Recreating the lib64 symlink to point at lib fixes the issue and centrify works, however the update will still fail since it will break it again during the upgrade process.

Output from the update command:
The following packages will be upgraded:
  centrifydc
1 upgraded, 0 newly installed, 0 to remove and 3 not upgraded.
92 not fully installed or removed.
Need to get 0 B/21.5 MB of archives.
After this operation, 22.6 MB of additional disk space will be used.
Do you want to continue [Y/n]? y
WARNING: The following packages cannot be authenticated!
  centrifydc
Authentication warning overridden.
(Reading database ... 523012 files and directories currently installed.)
Preparing to replace centrifydc 4.4.3-464-0ubuntu0 (using .../centrifydc_5.1.0-497-0ubuntu1_amd64.deb) ...
/var/lib/dpkg/tmp.ci/preinst: 73: [: -eq: unexpected operator
ls: cannot access /usr/share/centrifydc/lib64: No such file or directory
dpkg: error processing /var/cache/apt/archives/centrifydc_5.1.0-497-0ubuntu1_amd64.deb (--unpack):
 subprocess new pre-installation script returned error exit status 2
Errors were encountered while processing:
 /var/cache/apt/archives/centrifydc_5.1.0-497-0ubuntu1_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)