webos-ports-package: add kernel image and flash it on install

Signed-off-by: Simon Busch <morphis@gravedo.de>
classes: webos_enyojs_application.bbclass: cleanup and make more error prune

Signed-off-by: Simon Busch <morphis@gravedo.de>
Bump SRCREV for several apps and services

Signed-off-by: Simon Busch <morphis@gravedo.de>