Test adds 3 surfaces in a layer's render order list.
First, it adds in the order which surfaces are created.
Later, test cleans the render order list, and adds surfaces in reverse
order.
Signed-off-by: Emre Ucan <eucan@de.adit-jv.com>
Reviewed-by: Pekka Paalanen <pekka.paalanen@collabora.co.uk>