git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at df86c5e swresample/tests/swresample: Avoid av_assert2, remove ASSERT_LEVEL override
df86c5ef3a5524b92c4083473bf816f7df8a1df4