git version 2.4.0
Removing ffbuild/config.log
From https://git.ffmpeg.org/ffmpeg
 * branch            master     -> FETCH_HEAD
HEAD is now at 9cbd889 swscale/x86/ops: add AVX2/SSE4 path for SWS_UOP_READ_PALETTE
9cbd8896708050f12ccfcb1dd9aefda9e57dc349