libvirt.spec: /var/cache/libvirt should be 0711.

This allows qemu to create files in /var/cache/libvirt/qemu/, and
specifically is required to fix virDomainMemoryPeek.

libvirt.spec.in

@@ -932,7 +932,7 @@ fi
 
 %dir %attr(0711, root, root) %{_localstatedir}/lib/libvirt/images/
 %dir %attr(0711, root, root) %{_localstatedir}/lib/libvirt/boot/
-%dir %attr(0700, root, root) %{_localstatedir}/cache/libvirt/
+%dir %attr(0711, root, root) %{_localstatedir}/cache/libvirt/
 
 %if %{with_qemu}
 %dir %attr(0700, root, root) %{_localstatedir}/run/libvirt/qemu/