[avidemux/f32] (8 commits) ...Enable libvpx (rfbz#5925)

Summary of changes: 4e7c2d6... Rebuilt (*) 85c604d... - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass (*) 272f3fd... Use old cmake macro (*) 1b3f96a... Disable LTO, internal ffmpeg probably needs to be built wit (*) abffa93... Mass rebuild for x264-0.161 (*) bb709f7... - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass (*) ec56214... Fix FTBFS after mass rebuild. (*) 47500bf... Enable libvpx (rfbz#5925) (*) (*) This commit already existed in another branch; no separate mail sent