Bump libx264 to r2358 9e941d1.

Miscellaneous fixes and improvements.



git-svn-id: svn://svn.handbrake.fr/HandBrake/trunk@5814 b64f7644-9d1e-0410-96f1-a4d463321fa5
[build] Add bash script to get git repo info.
[build] Added git info processing in the configure step.
[x264] Added a script to get the most recent x264 encode library.
[x264] Removed patch not used in my updates of libx264, I mantain my own cloned x264 git repo
[x264] Bump to x264-r2358-9e941d1