Use os_posix in gyp file, this patch has been tested on FreeBSD, Solaris, and NetBSD.

Patch by chromium@hybridsource.org:
http://codereview.chromium.org/8673004/

git-svn-id: http://src.chromium.org/svn/trunk/deps/third_party/ffmpeg/source@111804 4ff67af0-8c30-449e-8e8b-ad334ec8d88c
1 file changed