Add 'self_check' runtime for running self-checking unit tests

pkg/kernel/test/parent_pointer_test_disabled.dart

Index: pkg/kernel/test/parent_pointer_test_disabled.dart
diff --git a/pkg/kernel/test/parent_pointer_test_disabled.dart b/pkg/kernel/test/parent_pointer_test_disabled.dart
deleted file mode 100644
index 292022767de461d43bf31d9c25789ad9eb6f5405..0000000000000000000000000000000000000000
--- a/pkg/kernel/test/parent_pointer_test_disabled.dart
+++ /dev/null
@@ -1,10 +0,0 @@
-// 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.
-import 'package:kernel/kernel.dart';
-import 'package:kernel/verifier.dart';
-
-main() {
-  Program program = loadProgramFromBinary('test/data/dart2js.dill');
-  CheckParentPointers.check(program);
-}