Roll Clang from 3928edecfbd1 to e6549b803608

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/clang-dart-sdk
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is aware of the problem.

To file a bug in Clang: https://bugs.fuchsia.dev/p/fuchsia/issues/list?q=component%3AToolchain
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Cq-Include-Trybots: luci.dart.try:dart-sdk-linux-try;luci.dart.try:dart-sdk-mac-try;luci.dart.try:dart-sdk-mac-arm64-try;luci.dart.try:dart-sdk-win-try
Change-Id: I9bc70a60a286f131db6717d3d351c4ab2aa84155
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/391340
Reviewed-by: Alexander Aprelev <[email protected]>
Reviewed-by: Ryan Macnak <[email protected]>
Commit-Queue: Ryan Macnak <[email protected]>

Author: DEPS Autoroller

DEPS

@@ -76,7 +76,7 @@ vars = {
   "jsc_tag": "version:285702",
 
   # https://chrome-infra-packages.appspot.com/p/fuchsia/third_party/clang
-  "clang_version": "git_revision:3928edecfbd116d56bbe7411365d50bb567380a1",
+  "clang_version": "git_revision:e6549b8036089f20c6ac01e644a544aa2b231ca8",
 
   # https://chrome-infra-packages.appspot.com/p/gn/gn
   "gn_version": "git_revision:feafd1012a32c05ec6095f69ddc3850afb621f3a",