[FFmpeg-cvslog] Merge commit 'acfa7a2178f08fd81b66279959cd55ec3ae237e2'

[James Almer]

ffmpeg | branch: master | James Almer <jamrial at gmail.com> | Tue Sep 26 17:11:48 2017 -0300| [3f9e7ddd90d324a2876f96d5e19a403f78995f70] | committer: James Almer

Merge commit 'acfa7a2178f08fd81b66279959cd55ec3ae237e2'

* commit 'acfa7a2178f08fd81b66279959cd55ec3ae237e2':
  configure: Drop weak dependencies on external libraries for webm muxer

This commit is a noop.

Merged-by: James Almer <jamrial at gmail.com>

> http://git.videolan.org/gitweb.cgi/ffmpeg.git/?a=commit;h=3f9e7ddd90d324a2876f96d5e19a403f78995f70
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