Update copyright in dart:dom interface templates

client/dom/generated/src/interface/XSLTProcessor.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2012, 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.
 
 // WARNING: Do not edit - generated code.
 
 interface XSLTProcessor default _XSLTProcessorFactoryProvider {
 
   XSLTProcessor();
 
   void clearParameters();
 
   String getParameter(String namespaceURI, String localName);
 
   void importStylesheet(Node stylesheet);
 
   void removeParameter(String namespaceURI, String localName);
 
   void reset();
 
   void setParameter(String namespaceURI, String localName, String value);
 
   Document transformToDocument(Node source);
 
   DocumentFragment transformToFragment(Node source, Document docVal);
 }