Move `reify` to use fasta instead of dartk

pkg/kernel/test/interpreter/suite.dart

Index: pkg/kernel/test/interpreter/suite.dart
diff --git a/pkg/kernel/test/interpreter/suite.dart b/pkg/kernel/test/interpreter/suite.dart
index 8c84abd1e2e05d1c7fac4e0369963828ff0bb87e..3e334d154416cf498d84aac773a8d6d027005a1e 100644
--- a/pkg/kernel/test/interpreter/suite.dart
+++ b/pkg/kernel/test/interpreter/suite.dart
@@ -13,6 +13,8 @@ import 'package:testing/testing.dart'
 
 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;
 
@@ -22,6 +24,7 @@ const String STRONG_MODE = " strong mode ";
 
 class InterpreterContext extends ChainContext implements CompileContext {
   final bool strongMode;
+  Target get target => null;
 
   final List<Step> steps;