Update ffmpeg
Ugly android buildfix
Merge pull request #1779 from oioitff/atrac-fix

Finally got how sceAtracAddStreamData should work.
Add files for support mpeg and atrac3plus.
Prepare for video.
Add media files cache.
Implement sceAtrac with dshow
Build fix
Implement scePsmf
Implement sceMpeg
A foolish bug fix.