Enable libass for ffmpeg
Fixed a typo of mpv (temp)
Create possible missing files before autoreconf
ffmpeg: Do not build encoders and muxers.

They are currently not used.
Compress mpv/mplayer2 with 7z + .sfx
Added zlib-build
Added a temp patch for mpv
create m4 dir before autoreconf
added libquvi-scripts-build
added glib-build