Roll Tint from 9b1ee6bdea to 688fe4477d (1 revision)

https://dawn.googlesource.com/tint.git/+log/9b1ee6bdeafd..688fe4477dff

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/tint-dawn
Please CC kainino@google.com on the revert to ensure that a human
is aware of the problem.

To report a problem with the AutoRoller itself, please file a bug:
https://bugs.chromium.org/p/skia/issues/entry?template=Autoroller+Bug

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/master/autoroll/README.md

Bug: None
Tbr: kainino@google.com
Change-Id: I62fa1209f46e9471aee13892be1987912dffcfa7
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/50860
Reviewed-by: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -96,7 +96,7 @@ deps = {
 
   # WGSL support
   'third_party/tint': {
-    'url': '{dawn_git}/tint@9b1ee6bdeafd19c84560339ee30404adf3a69c4e',
+    'url': '{dawn_git}/tint@688fe4477dffbe0ff6d4d5edab8fe202ec0ca66d',
   },
 
   # GLFW for tests and samples