git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at f1dbef3 avcodec/mjpegdec: avoid negative len in APP parser
f1dbef3e3879a9efbf9a81c04e1b73e8f9834893