* commit '5cc0057f':
  lavu: remove the custom atomic API

This commit is a noop. The removal is postponed until all usages in
FFmpeg are dropped as well. A patchset is on discussion on the
mailing-list:
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-March/209003.htmlMerged-by: Clément Bœsch <u@pkh.me>