Commit 3b5a0eeb reverted
3aa72711 resulting in lxc being unable
to be built on toolchain without SSP support

Fixes:
 - http://autobuild.buildroot.org/results/57945f54ffbc5c8764b6891a4516c4907e56ab97Signed-off-by: Fabrice Fontaine <fontaine.fabrice@gmail.com>