git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 1a0ab27 avfilter/af_aresample: propagate the matrix encoding used for downmixing
1a0ab27954b8bb780358a168ae5b6b9637412e14