Roll gn from 5d0a4153b0bc to 81b24e01531e

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Cq-Include-Trybots: luci.dart.try:dart-sdk-linux-try;luci.dart.try:dart-sdk-linux-arm64-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: I6d81507d4b2916650a42356f9374b5cf7ede21b3
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/450346
Reviewed-by: Alexander Markov <[email protected]>
Reviewed-by: Alexander Aprelev <[email protected]>
Commit-Queue: Alexander Markov <[email protected]>

Author: DEPS Autoroller

DEPS

@@ -78,7 +78,7 @@ vars = {
   "clang_version": "git_revision:49f39b349db181ca516eb0253462105ff0e2c634",
 
   # https://chrome-infra-packages.appspot.com/p/gn/gn
-  "gn_version": "git_revision:5d0a4153b0bcc86c5a23310d5b648a587be3c56d",
+  "gn_version": "git_revision:81b24e01531ecf0eff12ec9359a555ec3944ec4e",
 
   "reclient_version": "re_client_version:0.179.0.28341fc7-gomaip",
   "download_reclient": True,