packaging: setup: fix references to dialog.queryBoolean

Fixed references to dialog.queryBoolean introduced in
commit a24709a1 (2013-06-19)

Change-Id: I94abb99e9ba4e6bebc316ccfdb6e7bb9b8031400
Bug-Url: https://bugzilla.redhat.com/1110510
Signed-off-by: Sandro Bonazzola <sbonazzo@redhat.com>