git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 31c2f81 avformat/tls_gnutls: fix DTLS handshake failure in some WebRTC cases
31c2f814ca14c9d029111bc2349d4343270f0002