Give different runtime type representations to different types with the same name.

tests/language/first_class_types_lib2.dart

Index: tests/language/first_class_types_lib2.dart
diff --git a/lib/core/print.dart b/tests/language/first_class_types_lib2.dart
similarity index 85%
copy from lib/core/print.dart
copy to tests/language/first_class_types_lib2.dart
index 1c25a140ff43cb8b2832d065efdc137a58c37c05..19c127341e2f0a114c61ec651e5054162148267f 100644
--- a/lib/core/print.dart
+++ b/tests/language/first_class_types_lib2.dart
@@ -2,4 +2,6 @@
 // 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.
 
-external void print(Object object);
+#library('lib2.dart');
+
+class A {}