fixed #17717, typoed path for dojox/form/Uploader php example

Squashed commit of the following:

commit 5b4797af930fea9fc59bb716e4f262c3fd6f1970
Author: Dylan Schiemann <dylan@dojotoolkit.org>
Date:   Wed Oct 1 14:50:49 2014 -0700

    refs #17717, fix typoed path for UploadFile.php example/test