README.md: update package build reqs
README.md: update package build reqs

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