update_handler: fix post install hook in tar_to_ubifs_handler
update_handler: fix post install hook in tar_to_ubifs_handler

slot is already mounted, so call run_slot_hook

Signed-off-by: Jan Remmet <9c9945a0da87ab3eec6bcf12544e291bfd78ecfe@phytec.de>

ejoerns/rauc,jluebbe/rauc,jluebbe/rauc,ejoerns/rauc,jluebbe/rauc,ejoerns/rauc,rauc/rauc,rauc/rauc,rauc/rauc