git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 477bf79 avformat/tls_openssl: use SHA-256 instead of SHA-1 for self-signed cert
477bf79b06f1d3ec2ce87c8a3dc1f767b0151e8d