Roll Observatory packages and add a roll script

packages/intl/test/message_extraction/examples_parsing_test.dart

+// Copyright (c) 2014, 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 for parsing the examples argument from an Intl.message call. Very
+ * minimal so far.
+ */
+import 'package:unittest/unittest.dart';
+import 'package:intl/extract_messages.dart';
+import '../data_directory.dart';
+import 'package:path/path.dart' as path;
+import 'dart:io';
+
+main() {
+  test("Message examples are correctly extracted", () {
+    var file = path.join(intlDirectory, 'test', 'message_extraction',
+        'sample_with_messages.dart');
+    var messages = parseFile(new File(file));
+    expect(messages['message2'].examples, {"x": 3});
+  });
+}