Roll Tint from 97668c8c37 to dffa60ca98 (1 revision)

https://dawn.googlesource.com/tint.git/+log/97668c8c37fa..dffa60ca9882

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 bclayton@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/main/autoroll/README.md

Bug: None
Tbr: bclayton@google.com
Change-Id: I47083c999e4e05115062c1f1661be90691d23823
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/59980
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@97668c8c37fa2e6547eeb878ce84f5564c2dbe6c',
+    'url': '{dawn_git}/tint@dffa60ca98828f85c55f69f6de717c89b31f554e',
   },
 
   # GLFW for tests and samples