Split serialization tests further

tests/compiler/dart2js/serialization/compilation_1_test.dart

Index: tests/compiler/dart2js/serialization/compilation_1_test.dart
diff --git a/tests/compiler/dart2js/serialization/compilation4_test.dart b/tests/compiler/dart2js/serialization/compilation_1_test.dart
similarity index 69%
copy from tests/compiler/dart2js/serialization/compilation4_test.dart
copy to tests/compiler/dart2js/serialization/compilation_1_test.dart
index 7e2dc7cba91f780140e12f126e6acc4fcca01d65..355cddc45a5aa7bd9d5ee5b535de7670b3f74cc1 100644
--- a/tests/compiler/dart2js/serialization/compilation4_test.dart
+++ b/tests/compiler/dart2js/serialization/compilation_1_test.dart
@@ -2,11 +2,11 @@
 // 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.
 
-library dart2js.serialization.compilation4_test;
+library dart2js.serialization.compilation_1_test;
 
 import 'compilation_test_helper.dart' as test;
-import 'test_data.dart';
+import 'test_helper.dart';
 
 main() {
-  test.main(['${3 * TESTS.length ~/ 4}']);
+  test.main(testSkipped(1, test.SKIP_COUNT));
 }