apparmor, libvirtd: Allow ixr to /var/lib/libvirt/virtd*
apparmor, libvirtd: Allow ixr to /var/lib/libvirt/virtd*

This is required for the ebtables functionality added in
libvirt 0.8.0.

Signed-off-by: Stefan Bader <00beb3b1b08625be3b68f3989c75be8de7f2fd89@canonical.com>

fabianfreyer/libvirt,libvirt/libvirt,nertpinx/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,libvirt/libvirt,jfehlig/libvirt,andreabolognani/libvirt,olafhering/libvirt,jfehlig/libvirt,nertpinx/libvirt,eskultety/libvirt,eskultety/libvirt,zippy2/libvirt,nertpinx/libvirt,jardasgit/libvirt,libvirt/libvirt,zippy2/libvirt,zippy2/libvirt,jardasgit/libvirt,olafhering/libvirt,jardasgit/libvirt,andreabolognani/libvirt,crobinso/libvirt,andreabolognani/libvirt,crobinso/libvirt,andreabolognani/libvirt,crobinso/libvirt,nertpinx/libvirt,crobinso/libvirt,eskultety/libvirt,nertpinx/libvirt,libvirt/libvirt,fabianfreyer/libvirt,eskultety/libvirt,jardasgit/libvirt,jfehlig/libvirt,jfehlig/libvirt,olafhering/libvirt,fabianfreyer/libvirt,eskultety/libvirt,zippy2/libvirt,jardasgit/libvirt,olafhering/libvirt