Fix: undefined symbol error when loading lxc.so
Fix: undefined symbol error when loading lxc.so

lxc_strerror() doesn't not exist, it is nothing more than an idea. 
LXC folks don't have plans to add it any time soon

Signed-off-by: Jafar Al-Gharaibeh <227a9e5e65dc16417e45fbe5ddd6c7f94f0746fb@gmail.com>
lxc/ruby-lxc,lxc/ruby-lxc