Right now, mingw32-portablexdr is not available in Fedora, but is
present in fedora-mingw.git.  With that package, plus
redhat-rpm-config and this patch, it is once again possible to build
mingw32-libvirt from a Fedora 12 host.

* mingw32-libvirt.spec.in (__debug_install_post): Override.
(%files): Mention recent additions.