webos-image: Update layer pins for 2013-08-14

meta-webos as of 2013-08-14 17:11:21 -0700

f6875e4 webos-image: luna-sysservice=6 sntp=v4.2.6p5 ntp=0 ntp-tickadj=0

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