Roll gn from e4702d740906 to 5d76868385b8

If this roll has caused a breakage, revert this CL and stop the roller
using the controls here:
https://autoroll.skia.org/r/gn-dart-sdk
Please CC [email protected],[email protected] on the revert to ensure that a human
is aware of the problem.

To file a bug in gn: https://bugs.chromium.org/p/gn/issues/list
To file a bug in Dart SDK: https://github.com/dart-lang/sdk/issues

To report a problem with the AutoRoller itself, please file a bug:
https://issues.skia.org/issues/new?component=1389291&template=1850622

Documentation for the AutoRoller is here:
https://skia.googlesource.com/buildbot/+doc/main/autoroll/README.md

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: I14ffdc6052d3852afbe06a3ece4956686187f4cb
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/346500
Reviewed-by: Ryan Macnak <[email protected]>
Commit-Queue: Ryan Macnak <[email protected]>
Reviewed-by: Liam Appelbe <[email protected]>

DEPS

@@ -77,7 +77,7 @@ vars = {
   "clang_version": "git_revision:b3a9e8f7c0afb00147ab6c6a6ad426de149420dd",
 
   # https://chrome-infra-packages.appspot.com/p/gn/gn
-  "gn_version": "git_revision:e4702d7409069c4f12d45ea7b7f0890717ca3f4b",
+  "gn_version": "git_revision:5d76868385b81d6c4fb3256240a2ce449c37b5ee",
 
   "reclient_version": "git_revision:f3883c2237b0eb9cc9524cb571b5ab8378f257e4",