Fix mkdir error if it already exist
Fix mkdir error if it already exist

Signed-off-by: Laurent Barbe <f1b010126f61b5c59e7d5eb42c5c68f6105c5914@ksperis.com>

cjwatson/lxc,ysbnim/lxc,QingweiPeterLan/cs188-lxc,aeris/lxc,armcc/lxc,federicobriata/lxc,thmo/lxc,QingweiPeterLan/cs188-lxc,LynxChaus/lxc,GreatFruitOmsk/lxc,ksperis/lxc,akshaykarle/lxc,terceiro/lxc,ksperis/lxc,GreatFruitOmsk/lxc,hallyn/lxc,LynxChaus/lxc,thmo/lxc,aeris/lxc,ss1h2a3tw/lxc,terceiro/lxc,ysbnim/lxc,cjwatson/lxc,hallyn/lxc,caglar10ur/lxc,tych0/lxc,ysbnim/lxc,Distrotech/lxc,hfuCN/lxc,terceiro/lxc,hfuCN/lxc,armcc/lxc,bostjan/lxc,LynxChaus/lxc,federicobriata/lxc,Distrotech/lxc,aeris/lxc,hallyn/lxc,federicobriata/lxc,akshaykarle/lxc,cjwatson/lxc,thmo/lxc,hfuCN/lxc,bostjan/lxc,GreatFruitOmsk/lxc,QingweiPeterLan/cs188-lxc,armcc/lxc,caglar10ur/lxc,bostjan/lxc,tych0/lxc,Distrotech/lxc,ss1h2a3tw/lxc,tych0/lxc,caglar10ur/lxc,ss1h2a3tw/lxc,ksperis/lxc,akshaykarle/lxc