[plex-media-player/el8] (14 commits) ...Update to 2.58.1

Summary of changes: c6cb795... Improve compatibility with new CMake macro (*) 9a3a2a3... fix (*) 5342533... Revert "fix" (*) 021ce6f... Revert "Improve compatibility with new CMake macro" (*) 0487761... Use old cmake macro (*) 10f500f... bump release (*) 0d634eb... - Rebuilt for https://fedoraproject.org/wiki/Fedora_33_Mass (*) 0354a28... Rebuild for libcec (*) 5e19abf... Rebuild for new mpv (*) 8e96e02... Patch for new mpv (*) 70ea6e0... - Rebuilt for https://fedoraproject.org/wiki/Fedora_34_Mass (*) 3592121... Rebuilt for removed libstdc++ symbol (#1937698) (*) d9ca109... Update patches (*) d9c7efb... Update to 2.58.1 (*) (*) This commit already existed in another branch; no separate mail sent