Add copyright header to generated analyzer files.

pkg/analyzer/lib/src/generated/utilities_dart.dart

+// Copyright (c) 2014, 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.
+
 // This code was auto-generated, is not intended to be edited, and is subject to
 // significant change. Please see the README file for more information.
 
 library engine.utilities.dart;
 
 import 'java_core.dart';
 
 /**
  * The enumeration `ParameterKind` defines the different kinds of parameters. There are two
  * basic kinds of parameters: required and optional. Optional parameters are further divided into
@@ skipping 24 matching lines @@
     this._isOptional2 = isOptional;
   }
 
   /**
    * Return `true` if this is an optional parameter.
    *
    * @return `true` if this is an optional parameter
    */
   bool get isOptional => _isOptional2;
 }