Roll Observatory packages and add a roll script

packages/polymer/e2e_test/bad_import2/lib/a.dart

Index: packages/polymer/e2e_test/bad_import2/lib/a.dart
diff --git a/args/lib/args.dart b/packages/polymer/e2e_test/bad_import2/lib/a.dart
similarity index 61%
copy from args/lib/args.dart
copy to packages/polymer/e2e_test/bad_import2/lib/a.dart
index 562df446a83b70b2ee229a6567a2f7a09ddf0387..8167c9bdf1c760f15cee8e739c8dc9c8f8905dcd 100644
--- a/args/lib/args.dart
+++ b/packages/polymer/e2e_test/bad_import2/lib/a.dart
@@ -2,8 +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 args;
+library bad_import2.a;
 
-export 'src/arg_parser.dart';
-export 'src/arg_results.dart' hide newArgResults;
-export 'src/option.dart' hide newOption;
+import 'package:polymer/polymer.dart';
+
+int a = 0;
+@initMethod initA() {
+  a++;
+}