Accepting request 914527 from home:AZhou:branches:multimedia:libs

- Add ffmpeg-CVE-2021-38171.patch: Backport from upstream to fix
  adts_decode_extradata in libavformat/adtsenc.c in FFmpeg 4.4
  does not check the init_get_bits return value (bsc#1189724).

OBS-URL: https://build.opensuse.org/request/show/914527
OBS-URL: https://build.opensuse.org/package/show/multimedia:libs/ffmpeg-4?expand=0&rev=169

ffmpeg-4.spec

@@ -120,6 +120,7 @@ Patch8:         vmaf-trim-usr-local.patch
 Patch9:         ffmpeg-4.4-CVE-2020-22046.patch
 Patch10:        ffmpeg-CVE-2021-33815.patch
 Patch11:        ffmpeg-CVE-2021-38114.patch
+Patch12:        ffmpeg-CVE-2021-38171.patch
 BuildRequires:  ladspa-devel
 BuildRequires:  libgsm-devel
 BuildRequires:  libmp3lame-devel