Fix automatic mounts without a rootfs
Fix automatic mounts without a rootfs

Signed-off-by: David Ward <6be1308aeebeeeac115bb2fe2e0d71ae5645edd9@ll.mit.edu>
Acked-by: Serge E. Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

ksperis/lxc,ksperis/lxc,Ponce/lxc,fwilson42/lxc,cjwatson/lxc,DarknessBeforeDawn/lxc,lisongmin/lxc,terceiro/lxc,yubo/lxc,aeris/lxc,ss1h2a3tw/lxc,ysbnim/lxc,rowhit/lxc,Distrotech/lxc,cjwatson/lxc,hfuCN/lxc,LynxChaus/lxc,hallyn/lxc,Distrotech/lxc,GreatFruitOmsk/lxc,akshaykarle/lxc,QingweiPeterLan/cs188-lxc,terceiro/lxc,yubo/lxc,akshaykarle/lxc,rowhit/lxc,hallyn/lxc,caglar10ur/lxc,tych0/lxc,thmo/lxc,bmoar/lxc,thmo/lxc,armcc/lxc,yubo/lxc,thmo/lxc,ysbnim/lxc,GreatFruitOmsk/lxc,armcc/lxc,caglar10ur/lxc,Ponce/lxc,ss1h2a3tw/lxc,caglar10ur/lxc,fwilson42/lxc,DarknessBeforeDawn/lxc,Distrotech/lxc,ksperis/lxc,ss1h2a3tw/lxc,lisongmin/lxc,ioops/lxc,bostjan/lxc,QingweiPeterLan/cs188-lxc,hfuCN/lxc,GreatFruitOmsk/lxc,aeris/lxc,tych0/lxc,federicobriata/lxc,hallyn/lxc,ioops/lxc,ioops/lxc,bostjan/lxc,akshaykarle/lxc,hfuCN/lxc,aeris/lxc,lisongmin/lxc,DarknessBeforeDawn/lxc,cjwatson/lxc,ysbnim/lxc,szaszg/lxc,armcc/lxc,QingweiPeterLan/cs188-lxc,LynxChaus/lxc,terceiro/lxc,federicobriata/lxc,fwilson42/lxc,bmoar/lxc,Ponce/lxc,rowhit/lxc,bostjan/lxc,federicobriata/lxc,szaszg/lxc,szaszg/lxc,bmoar/lxc,tych0/lxc,LynxChaus/lxc