packaging: setup: add misc title

useful for satellite packages for prompting user, without re-work of the
titles mechanism.

Related-To: https://bugzilla.redhat.com/show_bug.cgi?id=1058013
Change-Id: I1d6807d7d57e235cc530dd5044551928dc5e385d
Signed-off-by: Alon Bar-Lev <alonbl@redhat.com>