Switched to omkized FFmpeg based on official GIT import.

Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz>

diff --git a/src/ffmpeg b/src/ffmpeg
index e60b080f779314c2d144e3139c996866c99e138b..7fa0fc772a5085ba7997b03f3f674bbe474341a3 160000 (submodule)
--- a/src/ffmpeg
+++ b/src/ffmpeg
@@ -1 +1 @@
-Subproject commit e60b080f779314c2d144e3139c996866c99e138b
+Subproject commit 7fa0fc772a5085ba7997b03f3f674bbe474341a3