Description of problem:

ttyS0 not preserved as a securetty in a v2v conversion of a Xen vm.

Version-Release number of selected component (if applicable):
# virt-v2v --version
0.8.7


Steps to Reproduce:
On Xen server
1. lvcreate -L 5G -n c5-remote <VolumeGroup>
2. virt-install --bridge=br0 --nographics --paravirt --file=/dev/<VolumeGroup>/c5-remote --location=http://<localmirror>/distros/centos/5/os/x86_64 --os-type=linux --os-variant=rhel5.4 --name=c5-remote --ram=512 --vcpus=1
3. shutdown

On kvm server:
4. virt-v2v -ic xen+ssh://root@<xen_server> -op vm_pool --bridge br0 c5-remote
5. virsh start c5-remote --console
6. login as root

expected result: successful login
actual result: failed login.
  
I compared the filesystems of both the pre- and post-converted vm, and found that xvc0 was stripped from /etc/securetty and ttyS0 was not inserted in its place.