gn: update to Git HEAD (2025-05-27)

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:=2025-04-29
-PKG_SOURCE_VERSION:=487f8353f15456474437df32bb186187b0940b45
-PKG_MIRROR_HASH:=9f017a7404faff9ba1896a2e22f96960e4976386b13dd4869d0c13a3e72c3581
+PKG_SOURCE_DATE:=2025-05-27
+PKG_SOURCE_VERSION:=a84e399f9999003472192286abc03d752c9cb1f0
+PKG_MIRROR_HASH:=a9aacb33c1d98fbc8064165b6e330b5686f6f5c89a9fb4ae13f9f2443b111437
 
 PKG_LICENSE:=BSD 3-Clause
 PKG_LICENSE_FILES:=LICENSE