DEPS: use our mirror for wuffs

Change-Id: I9bea0b03a70c70e9daba72bc7a24d0aaa8c1c354
Reviewed-on: https://skia-review.googlesource.com/c/186876
Reviewed-by: Eric Boren <borenet@google.com>
Commit-Queue: Hal Canary <halcanary@google.com>
1 file changed