webos-image: Update layer pins for 2014-05-07

meta-webos as of 2014-05-07 09:37:13 -0700

f70ab1c webos-image: luna-service2=187,v3.8.1

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

Change-Id: I14e26aa34107a54b11ac88eaccc519c2ed87780a
Reviewed-on: https://g2g.palm.com/5572
Reviewed-by: DCO Verification
Reviewed-by: Susan Montooth <susan.montooth@lge.com>
Tested-by: Susan Montooth <susan.montooth@lge.com>