[mythtv/f29] (6 commits) ...More fixes for ambiguous python shebang in F30

Summary of changes: c87d09e... Mass rebuild for x264 and/or x265 (*) e6daf6d... Update to 29.1.39.20181004git74fff5c285 from branch fixes/2 (*) 286e045... Fixes ERROR: ambiguous python shebang in F30 (*) 4b99675... Rework sources to avoid download all snapshot with 100MB, f (*) 2ee7c9a... Revert upstream commit b9c5f8b2ff983343d2545ec87022d18fcf65 (*) b1f5f5b... More fixes for ambiguous python shebang in F30 (*) (*) This commit already existed in another branch; no separate mail sent