Repo: add download callback support to swig
Repo: add download callback support to swig

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