suspend-blocker: Update DEPENDS from cjson to json-c

* cjson is only in meta-webos, json-c is everywhere else

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>
ffalarms, iliwi, sensmon, valacompass: Blacklist apps broken by vala upgrade

* patches to fix them are welcome

Signed-off-by: Martin Jansa <Martin.Jansa@gmail.com>