lxd/instance/drivers/driver/lxc: Renames lxc to liblxc
lxd/instance/drivers/driver/lxc: Renames lxc to liblxc

For clarity that this is the external lxc package (with the view that eventually LXC type will be renamed to lxc).

Signed-off-by: Thomas Parrott <6b778ce645fb0e3dde76d79eccad490955b1ae74@canonical.com>

stgraber/lxd,atxwebs/lxd,lxc/lxd,stgraber/lxd,lxc/lxd,hallyn/lxd,Skarlso/lxd,stgraber/lxd,mjeanson/lxd,hallyn/lxd,atxwebs/lxd,lxc/lxd,stgraber/lxd,hallyn/lxd,Skarlso/lxd,lxc/lxd,mjeanson/lxd,atxwebs/lxd,Skarlso/lxd,stgraber/lxd,atxwebs/lxd,hallyn/lxd,hallyn/lxd,mjeanson/lxd,lxc/lxd,hallyn/lxd,lxc/lxd,stgraber/lxd,stgraber/lxd,Skarlso/lxd,lxc/lxd