Add support for building patched_sdk and platform.dill for dart2js:

pkg/front_end/lib/src/fasta/analyzer/analyzer_target.dart

 // Copyright (c) 2017, 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 fasta.analyzer_target;
 
 import 'package:kernel/ast.dart' show Library, Source;
 
 import '../kernel/kernel_target.dart' show KernelTarget;
 
 import '../translate_uri.dart' show TranslateUri;
 
 import '../dill/dill_target.dart' show DillTarget;
 
 import 'analyzer_loader.dart' show AnalyzerLoader;
 
 class AnalyzerTarget extends KernelTarget {
   AnalyzerTarget(
       DillTarget dillTarget, TranslateUri uriTranslator, bool strongMode,
       [Map<String, Source> uriToSource])
-      : super(dillTarget, uriTranslator, strongMode, uriToSource);
+      : super(dillTarget, uriTranslator, strongMode, false, uriToSource);
 
   @override
   AnalyzerLoader<Library> createLoader() => new AnalyzerLoader<Library>(this);
 }