git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at d9e8c85 swscale/x86/ops_int: Check for cpuflag instead of avx_enabled
d9e8c856171834be8fe20fde0ed991e96f84acf0