[compat-ffmpeg28/f30] (6 commits) ...Update to 2.8.16

Summary of changes: 3a1477b... - Rebuilt for https://fedoraproject.org/wiki/Fedora_31_Mass (*) 133159e... Remove isa from obsoletes and provides (*) 03518b9... Drop obsoletes/provides (*) 23665d7... Drop obsoletes/provides (*) 92b7d3c... - Rebuilt for https://fedoraproject.org/wiki/Fedora_32_Mass (*) adb9a4a... Update to 2.8.16 (*) (*) This commit already existed in another branch; no separate mail sent