git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 87f17b6 swscale/x86: use HOSTCPPFLAGS instead of CPPFLAGS for native code
87f17b68a831b3ebe5f10278fc7acd3bebe83ecc