libselinux: Add support for lxc_contexts_path

In order for lxc to look up its process and file labels we add new
libselinux support.  This is what we do for everything else, like
libvirt, seposgresql, etc.

Signed-off-by: Eric Paris <eparis@redhat.com>
Acked-by: Dan Walsh <dwalsh@redhat.com>
4 files changed