Summary of changes:
a39dd91... update commit id to match 1.0.7 release (*)
3dfe8ed... drop redundant Provides/Obsoletes (*)
b4528b2... switch to a source URL that works with spectool/curl (*)
cb141ff... add GPG signature and verify it in prep (*)
c9dc855... Fix SubRip subtitle issue when built with FFmpeg (*)
(*) This commit already existed in another branch; no separate mail sent