Add corelib tests

test/codegen/corelib/main_test.dart

Index: test/codegen/corelib/main_test.dart
diff --git a/test/codegen/language/issue11724_test.dart b/test/codegen/corelib/main_test.dart
similarity index 75%
copy from test/codegen/language/issue11724_test.dart
copy to test/codegen/corelib/main_test.dart
index 146a6fea0a5025ade7a9556817e09b73e12411ac..141281196fae792229f0fe203315105f3d164794 100644
--- a/test/codegen/language/issue11724_test.dart
+++ b/test/codegen/corelib/main_test.dart
@@ -2,8 +2,9 @@
 // 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.
 
+library main_test;
 import "package:expect/expect.dart";
 
-void main() {
-  Expect.throws(() => method(<int>[]), (e) => e is NoSuchMethodError);
+main(List<String> args) {
+  Expect.equals(0, args.length);
 }