git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 9ab345b fftools/graph: Add missing include "libavutil/mem.h" for fftools/graph/graphprint.c
9ab345b2d1fd11d34985826f9a3ff4a5e2fa4e9e