ffmpeg build fails only if being built as a dependency of emby-server

[Ben Woods]

> On 5 Feb 2017, at 11:48 pm, Jan Beich <jbeich at freebsd.org> wrote:
> 
> Probably a regression from https://svnweb.freebsd.org/changeset/ports/428896
> which would be fixed after https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=215401

Indeed, that looks like the issue. Thanks for pointing that out.

Tsaki: looks like it will be fixed soon™.

Regards,
Ben