Make header include guards great again

runtime/bin/builtin.h

Index: runtime/bin/builtin.h
diff --git a/runtime/bin/builtin.h b/runtime/bin/builtin.h
index d7e1e4c226868c2d94a183d1f12bbf7dd23e12db..f61316a1174aa9f7858f1c81fc90f12065eca72c 100644
--- a/runtime/bin/builtin.h
+++ b/runtime/bin/builtin.h
@@ -2,8 +2,8 @@
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
-#ifndef BIN_BUILTIN_H_
-#define BIN_BUILTIN_H_
+#ifndef RUNTIME_BIN_BUILTIN_H_
+#define RUNTIME_BIN_BUILTIN_H_
 
 #include <stdio.h>
 #include <stdlib.h>
@@ -103,4 +103,4 @@ class Builtin {
 }  // namespace bin
 }  // namespace dart
 
-#endif  // BIN_BUILTIN_H_
+#endif  // RUNTIME_BIN_BUILTIN_H_