Add 'flutter_release' patch_sdk mode to patch_sdk

pkg/kernel/lib/target/targets.dart

 // Copyright (c) 2016, 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 kernel.target.targets;
 
 import '../ast.dart';
 import '../class_hierarchy.dart';
 import '../core_types.dart';
 import '../transformations/treeshaker.dart' show ProgramRoot;
 import 'flutter.dart' show FlutterTarget;
-import 'flutter_fasta.dart' show FlutterFastaTarget;
+import 'flutter_fasta.dart' show FlutterFastaTarget, FlutterFastaReleaseTarget;
 import 'vm.dart' show VmTarget;
 import 'vm_fasta.dart' show VmFastaTarget;
 import 'vmcc.dart' show VmClosureConvertedTarget;
 import 'vmreify.dart' show VmGenericTypesReifiedTarget;
 
 final List<String> targetNames = targets.keys.toList();
 
 class TargetFlags {
   bool strongMode;
   bool treeShake;
@@ skipping 10 matching lines @@
 typedef Target _TargetBuilder(TargetFlags flags);
 
 final Map<String, _TargetBuilder> targets = <String, _TargetBuilder>{
   'none': (TargetFlags flags) => new NoneTarget(flags),
   'vm': (TargetFlags flags) => new VmTarget(flags),
   'vm_fasta': (TargetFlags flags) => new VmFastaTarget(flags),
   'vmcc': (TargetFlags flags) => new VmClosureConvertedTarget(flags),
   'vmreify': (TargetFlags flags) => new VmGenericTypesReifiedTarget(flags),
   'flutter': (TargetFlags flags) => new FlutterTarget(flags),
   'flutter_fasta': (TargetFlags flags) => new FlutterFastaTarget(flags),
+  'flutter_fasta_release': (TargetFlags flags) =>
+      new FlutterFastaReleaseTarget(flags),
 };
 
 Target getTarget(String name, TargetFlags flags) {
   var builder = targets[name];
   if (builder == null) return null;
   return builder(flags);
 }
 
 /// A target provides backend-specific options for generating kernel IR.
 abstract class Target {
@@ skipping 147 matching lines @@
       bool isField: false,
       bool isLocalVariable: false,
       bool isDynamic: false,
       bool isSuper: false,
       bool isStatic: false,
       bool isConstructor: false,
       bool isTopLevel: false}) {
     return new InvalidExpression();
   }
 }