Move `reify` to use fasta instead of dartk

pkg/kernel/test/interpreter/suite.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.md file.
 
 library test.kernel.closures.suite;
 
 import 'dart:async' show Future;
 
 import 'dart:io' show File;
 
 import 'package:testing/testing.dart'
     show Chain, ChainContext, Result, Step, runMe;
 
 import 'package:kernel/ast.dart' show Program, Library;
 
+import 'package:kernel/target/targets.dart' show Target;
+
 import 'package:front_end/src/fasta/testing/kernel_chain.dart'
     show runDiff, Compile, CompileContext;
 
 import 'package:kernel/interpreter/interpreter.dart';
 
 const String STRONG_MODE = " strong mode ";
 
 class InterpreterContext extends ChainContext implements CompileContext {
   final bool strongMode;
+  Target get target => null;
 
   final List<Step> steps;
 
   InterpreterContext(this.strongMode)
       : steps = <Step>[
           const Compile(),
           const Interpret(),
           const MatchLogExpectation(".expect"),
         ];
 
@@ skipping 58 matching lines @@
   final Uri uri;
 
   /// Evaluated program log.
   final String log;
 
   EvaluationLog(this.uri, this.log);
 }
 
 main(List<String> arguments) =>
     runMe(arguments, InterpreterContext.create, "testing.json");