Roll Observatory packages and add a roll script

packages/source_maps/test/run.dart

+#!/usr/bin/env dart
+// Copyright (c) 2013, 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.
+
+library test.run;
+
+import 'package:unittest/compact_vm_config.dart';
+import 'package:unittest/unittest.dart';
+import 'dart:io' show Options;
+
+import 'builder_test.dart' as builder_test;
+import 'end2end_test.dart' as end2end_test;
+import 'parser_test.dart' as parser_test;
+import 'printer_test.dart' as printer_test;
+import 'refactor_test.dart' as refactor_test;
+import 'utils_test.dart' as utils_test;
+import 'vlq_test.dart' as vlq_test;
+
+main(List<String> arguments) {
+  var pattern = new RegExp(arguments.length > 0 ? arguments[0] : '.');
+  useCompactVMConfiguration();
+
+  void addGroup(testFile, testMain) {
+    if (pattern.hasMatch(testFile)) {
+      group(testFile.replaceAll('_test.dart', ':'), testMain);
+    }
+  }
+
+  addGroup('builder_test.dart', builder_test.main);
+  addGroup('end2end_test.dart', end2end_test.main);
+  addGroup('parser_test.dart', parser_test.main);
+  addGroup('printer_test.dart', printer_test.main);
+  addGroup('refactor_test.dart', refactor_test.main);
+  addGroup('utils_test.dart', utils_test.main);
+  addGroup('vlq_test.dart', vlq_test.main);
+}