implement exports, fixes #141

test/codegen/language/local_export_a.dart

Index: test/codegen/language/local_export_a.dart
diff --git a/tool/input_sdk/lib/core/type.dart b/test/codegen/language/local_export_a.dart
similarity index 70%
copy from tool/input_sdk/lib/core/type.dart
copy to test/codegen/language/local_export_a.dart
index d2e107b6b183f9f674dfba4e7138c195a2d69c19..e9c8819b0f90165b526b8bbb2ce06f86c19ce14b 100644
--- a/tool/input_sdk/lib/core/type.dart
+++ b/test/codegen/language/local_export_a.dart
@@ -2,9 +2,10 @@
 // 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.
 
-part of dart.core;
+library local_export_a;
 
-/**
- * Runtime representation of a type.
- */
-abstract class Type {}
+export 'local_export_a_export.dart';
+
+class A {
+  method() => 42;
+}