abrt-destkop package requires libreport-fedora package

- closes rhbz#908256

Signed-off-by: Jakub Filak <jfilak@redhat.com>
rpm: add SETGID bit on a-a-i-d-i-t-a-cache executable

- we must use both SETUID and SETGID flags otherwise single SETGID will cause
  that files created in the cache will have owner set to a caller. The caller is
  usually a user and we don't wan to allow users to change cache files
  permissions

- related to issue #583 (/var/spool/abrt -> /var/tmp/abrt)

Signed-off-by: Jakub Filak <jfilak@redhat.com>