Language tests updated to use const instead of final.

tests/language/library11.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.
 //
 
 #library("library11.dart");
 
 class Library11 {
   Library11(this.fld);
   Library11.namedConstructor(this.fld);
   func() {
     return 3;
   }
   var fld;
   static static_func() {
     return 2;
   }
   static var static_fld = 1;
 }
 
 class Library111<T> {
   Library111.namedConstructor(T this.fld);
   T fld;
 }
 
 
-final int top_level11 = 100;
+const int top_level11 = 100;
 top_level_func11() {
   return 200;
 }