git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 4deb8b3 avutil/vulkan_glslang: use AVMutex instead of pthread_mutex_t
4deb8b3a7a3fc6131c8adb90ee9e32f7f2029575