git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 4bb9b46 avcodec/demux: validate avctx state in has_decode_delay_been_guessed
4bb9b46486b3f02a5d826ca93d5192bcbfb84ba5