webos-image: Update layer pins for 2014-03-28

meta-webos as of 2014-03-28 11:45:39 -0700

ec084df webos-image: libpbnjson=31

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

Change-Id: If33f7ea8c893919602750b3691540a7eede4f983
Reviewed-on: https://g2g.palm.com/5152
Reviewed-by: DCO Verification
Build: Susan Montooth <susan.montooth@lge.com>
Reviewed-by: Build Verification
Reviewed-by: Susan Montooth <susan.montooth@lge.com>
Tested-by: Susan Montooth <susan.montooth@lge.com>