gn: Update to git HEAD

gn/src/out/last_commit_position.h

@@ -3,7 +3,7 @@
 #ifndef OUT_LAST_COMMIT_POSITION_H_
 #define OUT_LAST_COMMIT_POSITION_H_
 
-#define LAST_COMMIT_POSITION_NUM 2203
-#define LAST_COMMIT_POSITION "2203 (95b0f8fe31a9)"
+#define LAST_COMMIT_POSITION_NUM 2205
+#define LAST_COMMIT_POSITION "2205 (24e92acb8472)"
 
 #endif  // OUT_LAST_COMMIT_POSITION_H_