[avidemux/f28] (12 commits) ...Add new patches.

Summary of changes: 9491b86... Rebuild for new libass version (*) 9229a16... - Rebuilt for https://fedoraproject.org/wiki/Fedora_29_Mass (*) 9b53cac... Mass rebuild for x264 and/or x265 (*) a913da7... Rebuild for new x265 (*) 1781867... Rebuild for ffmpeg-3.4.5 on el7 (*) b156a27... Rebuild for new x265 (*) 5452f68... - Rebuilt for https://fedoraproject.org/wiki/Fedora_30_Mass (*) 984ce28... Add patch for gcc 9 to fix bundled ffmpeg building, fixes R (*) 230b2b5... Mass rebuild for x264 (*) 8f4243f... Switch to nv-codec-headers (*) 0dbc916... Update to 2.7.3 and apply upstream patches per user request (*) 87158e0... Add new patches. (*) (*) This commit already existed in another branch; no separate mail sent