Update Wuffs version

Bug: oss-fuzz:11823

This pulls in the Wuffs bug fix:
https://github.com/google/wuffs/commit/0842bc71157ce7a2cc875dea5dcb167b4177cfa8
"Make the GIF dirty_rect be in the frame_rect".

Change-Id: Ib4928eb3cbf4bc862c3ae709fdfe6f179412f95f
Reviewed-on: https://skia-review.googlesource.com/c/190940
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
2 files changed