Split date formatting tests in two to avoid timeouts

pkg/intl/test/date_time_format_local_even_test.dart

Index: pkg/intl/test/date_time_format_local_even_test.dart
===================================================================
--- pkg/intl/test/date_time_format_local_even_test.dart	(revision 0)
+++ pkg/intl/test/date_time_format_local_even_test.dart	(revision 0)
@@ -0,0 +1,18 @@
+// Copyright (c) 2012, 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.
+
+/**
+ * Test date formatting and parsing using locale data which is available
+ * directly in the program as a constant. This tests one half the locales,
+ * since testing all of them takes long enough that it may cause timeouts in
+ * the test bots.
+ */
+
+#library('date_time_format_test_2');
+#import('date_time_format_local_test_stub.dart');
+#import('date_time_format_test_core.dart');
+
+main() {
+  runWith(evenLocales);
+}