Log Message:
ffmpeg4: Add native Solaris/NetBSD audio support.

Work by Yorick Hardy and myself.

Also submitted to ffmpeg-devel, but they didn't take much notice.

To record audio:

$ ffmpeg4 -f sunau -i /dev/audio0 recording.wav

To play audio:

$ ffmpeg4 -i recording.wav -f sunau /dev/audio0

Bump PKGREVISION