gn: Update to git HEAD

gn/Makefile

@@ -9,9 +9,9 @@ PKG_RELEASE:=1
 
 PKG_SOURCE_PROTO:=git
 PKG_SOURCE_URL:=https://gn.googlesource.com/gn.git
-PKG_SOURCE_DATE:=2024-08-13
-PKG_SOURCE_VERSION:=54f5b539df8c4e460b18c62a11132d77b5601136
-PKG_MIRROR_HASH:=1b5562417adfa29823301fea948197b23dfc887838fc94f96df5bbfd132dc592
+PKG_SOURCE_DATE:=2024-09-02
+PKG_SOURCE_VERSION:=50ecf4c84d08dad3d16d14590221dd43fe65ea62
+PKG_MIRROR_HASH:=bd7d7ce931b1c83409bfbbc276b79a89cff19fbe511c6071cda50d37f4983aeb
 
 PKG_LICENSE:=BSD 3-Clause
 PKG_LICENSE_FILES:=LICENSE