Merge commit '6c916192'

* commit '6c916192':
  mimic: Convert to the new bitstream reader
  metasound: Convert to the new bitstream reader
  lagarith: Convert to the new bitstream reader
  indeo: Convert to the new bitstream reader
  imc: Convert to the new bitstream reader
  webp: Convert to the new bitstream reader

This merge is a noop, see
http://ffmpeg.org/pipermail/ffmpeg-devel/2017-April/209609.htmlMerged-by: Clément Bœsch <u@pkh.me>