Roll Observatory packages and add a roll script

packages/intl/test/intl_message_basic_example_test.dart

+// 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.
+
+/**
+ * Tests internationalization of messages using the basic example as a template.
+ */
+library intl_message_test_2;
+
+import '../example/basic/basic_example.dart';
+import 'package:unittest/unittest.dart';
+import 'dart:async';
+
+main() {
+  var list = [];
+  var waitForIt = new Completer();
+
+  addToList(x) {
+    list.add(x);
+    if (list.length == 4) {
+      waitForIt.complete(list);
+    }
+  }
+
+  test('Verify basic example printing localized messages', () {
+    runAllTests(_) {
+      setup(expectAsync(runProgram), addToList);
+    }
+    setup(expectAsync(runAllTests), addToList);
+    waitForIt.future.then(expectAsync((_) {
+      expect(list[0], "Ran at 00:00:00 on Thursday, January 1, 1970");
+      expect(list[1], "Ausgedruckt am 00:00:00 am Donnerstag, 1. Januar 1970.");
+      expect(list[2], "วิ่ง 00:00:00 on วันพฤหัสบดี 1 มกราคม 1970.");
+      expect(list[3], "วิ่ง now on today.");
+    }));
+  });
+}