test rename overhaul: step 8 - language tests

tests/language/switch5_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.
 // Break' to case label is illegal.
 
 class Switch5NegativeTest {
 
   static testMain() {
     var a = 5;
     var x;
     switch (a) {
       L:
       case 1:
         x = 1; break;
       case 6:
         x = 2; break L;  // illegal
       default:
         break;
     }
     return a;
   }
 }
 
 main() {
   Switch5NegativeTest.testMain();
 }