Update Wuffs version

Bug: skia:8764
Bug: skia:8767
Bug: skia:8764

This pulls in the Wuffs bug fix:
https://github.com/google/wuffs/commit/ab7d6de3180b734169f48b5a3a4fda7a363cc083
"Let Wuffs compile with MSVC (Microsoft Visual C++)".

This also pulls in fixes for
https://github.com/google/wuffs/issues/20
"Check for "not enough pixel data" and return an Error or Warning"

Change-Id: Ie75e57504f1ec872418e8851e10de9159f714bc5
Reviewed-on: https://skia-review.googlesource.com/c/193200
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
diff --git a/DEPS b/DEPS
index d69c5f9..4c3dfcc 100644
--- a/DEPS
+++ b/DEPS
@@ -30,7 +30,7 @@
   "third_party/externals/spirv-tools"     : "https://skia.googlesource.com/external/github.com/KhronosGroup/SPIRV-Tools.git@e9e4393b1c5aad7553c05782acefbe32b42644bd",
   "third_party/externals/swiftshader"     : "https://swiftshader.googlesource.com/SwiftShader@e2d8b1286ce31e572675f2640e265dcc1385ae30",
   #"third_party/externals/v8"              : "https://chromium.googlesource.com/v8/v8.git@5f1ae66d5634e43563b2d25ea652dfb94c31a3b4",
-  "third_party/externals/wuffs"           : "https://skia.googlesource.com/external/github.com/google/wuffs.git@937a7810227adaa02d7933b79dd87b6afa30bc78",
+  "third_party/externals/wuffs"           : "https://skia.googlesource.com/external/github.com/google/wuffs.git@2276be64e93bd7664e0fec191b8fb3139d516ba8",
   "third_party/externals/zlib"            : "https://chromium.googlesource.com/chromium/src/third_party/zlib@47af7c547f8551bd25424e56354a2ae1e9062859",
   "third_party/externals/Nima-Cpp"        : "https://skia.googlesource.com/external/github.com/2d-inc/Nima-Cpp.git@4bd02269d7d1d2e650950411325eafa15defb084",
   "third_party/externals/Nima-Math-Cpp"   : "https://skia.googlesource.com/external/github.com/2d-inc/Nima-Math-Cpp.git@e0c12772093fa8860f55358274515b86885f0108",