webos-image: Layer pins for 2013-07-08

meta-webos as of 2013-07-08 18:47:13 -0700

292df67 xkeyboard-config: Remove xkbcomp from RDEPENDS
623b5db luna-sysservice: Add missing dependency on libxml2 and sqlite3
0742e44 alsa-plugins: Disable a52 plugin

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