Roll third_party/tint/ 9ef07b236..e496b952f (4 commits)

https://dawn.googlesource.com/tint/+log/9ef07b236002..e496b952f1a5

$ git log 9ef07b236..e496b952f --date=short --no-merges --format='%ad %ae %s'
2021-09-09 bclayton resolver: Validate unreachable stmts when terminator is in block(s)
2021-09-09 bclayton Resolver: Traverse expressions without recursion
2021-09-02 bclayton resolver: Validate that entry points are not called
2021-08-31 bclayton resolver: Validate storage class for var initializers

Created with:
  roll-dep third_party/tint

Bug: chromium:1246163
Bug: chromium:1246375
Bug: chromium:1245112
Bug: chromium:1243418
No-Try: true
Change-Id: Ic6c23725310d7ce298d7c1b64680810e6ff08142
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/63900
Auto-Submit: Ben Clayton <bclayton@google.com>
Reviewed-by: David Neto <dneto@google.com>
Commit-Queue: David Neto <dneto@google.com>
diff --git a/DEPS b/DEPS
index b19f8d2..532b356 100644
--- a/DEPS
+++ b/DEPS
@@ -96,7 +96,7 @@
 
   # WGSL support
   'third_party/tint': {
-    'url': '{dawn_git}/tint@9ef07b236002821c0074517a55554d5ea25ed097',
+    'url': '{dawn_git}/tint@e496b952f1a5cd0b8ed681d186f98da71dc22f45',
   },
 
   # GLFW for tests and samples