Roll third_party/wuffs to version 0.3.0-alpha.13

Change-Id: I4cacda602ab66fc165c89b656b156dccfba0588d
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2398750Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Nigel Tao <nigeltao@chromium.org>
Cr-Commit-Position: refs/heads/master@{#805711}

DEPS

@@ -334,7 +334,7 @@ vars = {
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling wuffs
   # and whatever else without interference from each other.
-  'wuffs_revision': '67503b5bda0274b637671e277ede1e34dd08b1d7',
+  'wuffs_revision': 'ba75ce9c5f224a646d92801b0b8ef74f555d490e',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libgifcodec
   # and whatever else without interference from each other.

third_party/wuffs/README.chromium

 Name: Wuffs (Wrangling Untrusted File Formats Safely)
 Short name: Wuffs
 URL: https://github.com/google/wuffs
-Version: 0.3.0-alpha.11
-Revision: 67503b5bda0274b637671e277ede1e34dd08b1d7
+Version: 0.3.0-alpha.13
+Revision: ba75ce9c5f224a646d92801b0b8ef74f555d490e
 Security critical: yes
 License: Apache 2.0