Add copyright header to generated analyzer files.

pkg/analyzer/test/generated/resolver_test.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.resolver_test;
 
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/java_junit.dart';
 import 'package:analyzer/src/generated/source_io.dart';
 import 'package:analyzer/src/generated/error.dart';
 import 'package:analyzer/src/generated/scanner.dart';
@@ skipping 23203 matching lines @@
 //  HintCodeTest.dartSuite();
 //  MemberMapTest.dartSuite();
 //  NonHintCodeTest.dartSuite();
 //  NonErrorResolverTest.dartSuite();
 //  SimpleResolverTest.dartSuite();
 //  StaticTypeWarningCodeTest.dartSuite();
 //  StaticWarningCodeTest.dartSuite();
 //  StrictModeTest.dartSuite();
 //  TypePropagationTest.dartSuite();
 }