packaging: setup: List unreverted changes on cleanup

Similarly to what we do with files that do not match their saved hash
and are not deleted, output lines in files that were supposed to be
reverted but are not found.

Change-Id: Ib9555c6d6a2f1652edc1065f9c49154123e8accc
Signed-off-by: Yedidyah Bar David <didi@redhat.com>