[x264/el8] (7 commits) ...Update changelog

Summary of changes: 05cb528... Fix ARM rpm mangle issue (*) 3ac3557... Replace all tabs by spaces (expandtabs) (*) 448f5b4... Revert "Build /usr/bin/x264 with gpac shared lib instead st (*) ccfb34c... 0.157 update, date 2019-07-17 (stable branch) (*) 143f9e9... Rebuild for new ffmpeg version (*) 4178b9c... Drop hack for armv7hl libraries (*) c8b97a7... Update changelog (*) (*) This commit already existed in another branch; no separate mail sent