Here is my patch to promote FFMPEG in VLC

This patch make VLC use FFMPEG before other codecs and force VLC to use FFMPEG instead of libmp4 to demux MP4 since libmp4 don't support HEVC yet.
This makes FFMPEG's codecs promoted in VLC.

This patch apply a few patches in VLC tree to promote FFMPEG's codecs.
It makes HEVC and FDK-AAC usable in VLC.
Tested with mp4 and mkv with HEVC (x265) + AAC-ELD (fdk-aac) files.
Merge pull request #47 from gcsx/patch-5

Wanna use your brand new FFMPEG with non-free in VLC ?