git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at bc8d06d avfilter/vf_thumbnail: unroll and use multiple histograms
bc8d06d54188a3c1ba878b7e0bca66b9e4b3ceea