Roll Tint from 8b40a67cf7 to a57f842be9 (7 revisions)

https://dawn.googlesource.com/tint.git/+log/8b40a67cf792..a57f842be951

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 rharrison@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: rharrison@google.com
Change-Id: Iacaffed87fe4bf03315bc78bb792e29ec02a7d19
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/35940
Reviewed-by: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>
Commit-Queue: Dawn Autoroller <dawn-autoroll@skia-public.iam.gserviceaccount.com>

DEPS

@@ -82,7 +82,7 @@ deps = {
 
   # WGSL support
   'third_party/tint': {
-    'url': '{dawn_git}/tint@8b40a67cf79240dab5ab40df2929b3329627c1d0',
+    'url': '{dawn_git}/tint@a57f842be9518094c8e9fbc6da1a896cb268f969',
     'condition': 'dawn_standalone',
   },