test rename overhaul: step 8 - language tests

tests/language/label2_negative_test.dart

 // Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
 // 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.
 // Dart test program to test check that we catch label errors.
 
 
 class Label2NegativeTest {
   static testMain() {
     if (true) {
       break; // Illegal: not embedded in a loop.
     }
   }
 }
 
 
 main() {
   Label2NegativeTest.testMain();
 }