packaging: engine-upgrade - log DB upgrade in the right place

DB Upgrade script should be run with the wanted log location, otherwise,
it creates the upgrade log in the dbscripts directory (currently, in
/usr/share)

Change-Id: I15cb1e0d7ce12a27ae07c92025db6b21636957c9
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=947344
Signed-off-by: Ofer Schreiber <oschreib@redhat.com>