[libvirt] Second pass at patch to get different SELinux Labels for virt-sandbox

[Dan Walsh]

selinux-policy-3.12.1-87.fc21
selinux-policy-3.12.1-87.fc20

Now have lxc_contexts files that look like

> cat /etc/selinux/targeted/contexts/lxc_contexts
lxc=system_u:system_r:svirt_lxc_net_t:s0
qemu=system_u:system_r:svirt_qemu_net_t:s0
kvm=system_u:system_r:svirt_qemu_net_t:s0
process=system_u:system_r:svirt_lxc_net_t:s0
file=system_u:object_r:svirt_sandbox_file_t:s0
content=system_u:object_r:virt_var_lib_t:s0

[sandbox PATCH] virt-sandbox patch to launch containers with proper