webos-image: Update layer pins for 2013-09-14

meta-webos as of 2013-09-15 03:33:26 -0700

d2c260d packagegroup-*: Add comment about changed policy on PR bumps
b4c3946 Convert PREFERRED_VERSION to WEBOS_VERSION settings in recipes
a3af7d4 webos_enhanced_submissions: Add sanity check for tags
5796817 webos_enhanced_submissions, webos_submissions: Switch to use WEBOS_VERSION
ca9fb39 Rename WEBOS_GIT_TAG to WEBOS_GIT_PARAM_TAG

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