git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 069201c avcodec/h264_refs: Make ff_h264_build_ref_list stricter with AV_EF_EXPLODE
069201c53561795bc18e55d1e2eb84dc03cf1ed3