git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 45bc251 configure: support z.lib and zlib.lib for zlib on MSVC-style linkers
45bc2518bed20b1bab4e71afb13feba0e4aeb205