[spec] Fix spec for RHEL 7.
[spec] Fix spec for RHEL 7.

hughsie/libhif,rpm-software-management/libdnf,Conan-Kudo/libhif,rpm-software-management/libhif,hughsie/libhif,hughsie/libhif,hughsie/libhif,Conan-Kudo/libhif,rpm-software-management/libhif,rpm-software-management/libdnf,Conan-Kudo/libhif,rpm-software-management/libhif,rpm-software-management/libdnf,rpm-software-management/libhif,rpm-software-management/libdnf,Conan-Kudo/libhif