Add tests for list and async marker

tests/compiler/dart2js/inference/data/list.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.
+
+/*main:[null]*/
+main() {
+  emptyList();
+  nullList();
+  constList();
+  constNullList();
+}
+
+/*emptyList:Container mask: [empty] length: 0 type: [exact=JSExtendableArray]*/
+emptyList() => [];
+
+/*constList:Container mask: [empty] length: 0 type: [exact=JSUnmodifiableArray]*/
+constList() => const [];
+
+/*nullList:Container mask: [null] length: 1 type: [exact=JSExtendableArray]*/
+nullList() => [null];
+
+/*constNullList:Container mask: [null] length: 1 type: [exact=JSUnmodifiableArray]*/
+constNullList() => const [null];