Fix names of some tests in dart2js_extra.

tests/compiler/dart2js_extra/22895.dart

Index: tests/compiler/dart2js_extra/22895.dart
diff --git a/tests/compiler/dart2js_extra/22895.dart b/tests/compiler/dart2js_extra/22895.dart
deleted file mode 100644
index 73f120db967ce2d4bb096032f263c2d82163cb4f..0000000000000000000000000000000000000000
--- a/tests/compiler/dart2js_extra/22895.dart
+++ /dev/null
@@ -1,11 +0,0 @@
-// Copyright (c) 2015, 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.
-
-// Regression test for http://dartbug.com/22895/
-// Ensure that the type graph is retained in presence of await.
-
-main() async {
-  var closures = [(x, y) => x + y];
-  print(((await closures)[0])(4, 2));
-}