K 10
svn:author
V 6
jbeich
K 8
svn:date
V 27
2016-11-07T18:07:51.307389Z
K 7
svn:log
V 277
MFH: r425640

multimedia/ffmpeg: switch to clang on 9.x

It turns out the following is true for ffvp9 on amd64:

  WARNING: gcc 4.2 is outdated and may miscompile FFmpeg. Please use a newer compiler.

PR:		213706
Approved by:	portmgr blanket
Approved by:	ports-secteam blanket

END