Adding a couple of upstream fixes for lxc:
- follow symlinks when determining if Busybox is statically linked
- don't fail for lxc.network.type = none
- don't fail if no default macvlan mode is specified

More details are available in the individual patches.

Signed-off-by: Bogdan Purcareata <bogdan.purcareata@freescale.com>
Signed-off-by: Bruce Ashfield <bruce.ashfield@windriver.com>