webos-image: Update layer pins for 2013-05-24 (2 of 2)

meta-webos as of 2013-05-24 13:21:03 -0700

e7b8497 Add WEBOS_PACKAGESET variable for System Apps
cb03ba8 webos-image: luna-service2 = 150

Open-webOS-DCO-1.0-Signed-off-by: Susan Montooth <susan.montooth@lge.com>