git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 1f6699e ffbuild/common: remove DBG=1 to preprocess external asm
1f6699ef2675cba1ba2faa2472b4b0e200d07d34