Roll Tint from 667bc2d929 to a9d6c34d86 (1 revision)

https://dawn.googlesource.com/tint.git/+log/667bc2d929bd..a9d6c34d868a

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 file a bug in Dawn: https://bugs.chromium.org/p/dawn/issues/entry

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: Ife1e7454231a19bce427550cf7fdc6c8ffef4363
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/73520
Bot-Commit: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -101,7 +101,7 @@ deps = {
 
   # WGSL support
   'third_party/tint': {
-    'url': '{dawn_git}/tint@667bc2d929bd3e5c0bf30d6b6b3c95a1496f6b7c',
+    'url': '{dawn_git}/tint@a9d6c34d868affa55c403ce82428882b825441a2',
   },
 
   # GLFW for tests and samples