commit 08b873457 ("deploy: Remove checksum from generated loader entries")
changed the generated loader entries file names thus making the U-Boot test
case to fail since this test parsed those files.
Fix test-admin-deploy-uboot.sh by looking to the updated files names.
https://bugzilla.gnome.org/show_bug.cgi?id=708511
Signed-off-by: Javier Martinez Canillas <javier.martinez@collabora.co.uk>