[telegram-desktop/el8] (14 commits) ...Updated to version 1.8.3. Switched back to GCC.

Summary of changes: 26f0eb0... Updated to 1.7.1 (beta). (*) bdd2e66... Updated to version 1.7.3. (*) 3e539a3... Updated to version 1.7.7. (*) e37290a... Updated to version 1.7.9. (*) a04cb46... Updated to version 1.7.10. (*) 514851a... Rebuild for new Qt5. (*) ab912f4... Updated to version 1.7.14. (*) 5656acb... Rebuild for new ffmpeg version (*) ac3e24f... Updated to version 1.8.0. (*) c844a3d... Updated to version 1.8.1. (*) c9eb131... Updated to version 1.8.2. (*) 7960f32... Added missing dependency to kde subpackage. (*) 7baa766... Removed KDE subpackage. (*) 7b37c31... Updated to version 1.8.3. Switched back to GCC. (*) This commit already existed in another branch; no separate mail sent