Roll gn from 0c25d1bbde6e to ebc8f16ca7b0

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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: Id796c89ea39d080ddf26cca9eb7b06732fd8faaa
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/430080
Reviewed-by: Ryan Macnak <[email protected]>
Commit-Queue: Derek Xu <[email protected]>
Reviewed-by: Derek Xu <[email protected]>

Author: DEPS Autoroller

DEPS

@@ -78,7 +78,7 @@ vars = {
   "clang_version": "git_revision:8c7a2ce01a77c96028fe2c8566f65c45ad9408d3",
 
   # https://chrome-infra-packages.appspot.com/p/gn/gn
-  "gn_version": "git_revision:0c25d1bbde6ef17e1e6d3938011f56a00c02e457",
+  "gn_version": "git_revision:ebc8f16ca7b0d36a3e532ee90896f9eb48e5423b",
 
   "reclient_version": "re_client_version:0.178.0.5ee9d3e8-gomaip",
   "download_reclient": True,