tests: introduce basic pci test for virtio-net Signed-off-by: Jason Wang <jasowang@redhat.com> Reviewed-by: Fam Zheng <famz@redhat.com> Message-id: 1437117954-16342-1-git-send-email-jasowang@redhat.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>