Roll Observatory packages and add a roll script

packages/path/.status

Index: packages/path/.status
diff --git a/packages/path/.status b/packages/path/.status
new file mode 100644
index 0000000000000000000000000000000000000000..bfc58fc16d8507556ad139a5979c4b6f1b9c6fe9
--- /dev/null
+++ b/packages/path/.status
@@ -0,0 +1,21 @@
+# 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.
+
+# Skip non-test files ending with "_test".
+packages/*: Skip
+*/packages/*: Skip
+*/*/packages/*: Skip
+*/*/*/packages/*: Skip
+*/*/*/*packages/*: Skip
+*/*/*/*/*packages/*: Skip
+
+# Only run tests from the build directory, since we don't care about the
+# difference between transformed an untransformed code.
+test/*: Skip
+
+[ $browser ]
+build/test/io_test: Fail, OK # Uses dart:io.
+
+[ $runtime == vm ]
+build/test/browser_test: Fail, OK # Uses dart:html