agent: more spec file fixes after Stephen Gordon's review.
agent: more spec file fixes after Stephen Gordon's review.

Change-Id: Ic2a1fc10e51b70391dcde8abb9a6a3fb70169ce8

edwardbadboy/ovirtagent-ubuntu,edwardbadboy/ovirtagent-ubuntu,oVirt/ovirt-guest-agent,silenceli/oga-windows,oVirt/ovirt-guest-agent,silenceli/oga-windows,oVirt/ovirt-guest-agent,silenceli/oga-windows,oVirt/ovirt-guest-agent,edwardbadboy/ovirtagent-ubuntu,edwardbadboy/ovirtagent-ubuntu,silenceli/oga-windows