git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at a5091f6 avfilter/formats: add type-safe functions for AVSampleFormat/AVPixelFormat lists
a5091f6d66f74e3d1ce5c9604fe59523346890bb