git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 8f17697 avformat/mxfdec: zero-init Sony MPEG-4 extradata and add padding
8f1769703c62c808e88c358de6496ed2a7fbce2e