git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at c9710da swscale/format: add missing fmt_shift for gray12/12 msb formats
c9710dae3c6151a22f0fff60f0a9b4514f6a3b97