git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at c0b7f81 avcodec/Makefile: Skip ffv1_vulkan.h in checkheaders
c0b7f817a4c72eb3e501f94f403b3031114e8d98