valgrind: fix small leak in cgroup
valgrind: fix small leak in cgroup

Signed-off-by: Dwight Engen <1793d65cf7b9eefb2bb8f5bee9a4b8ba782c26da@oracle.com>
Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

yubo/lxc,raspberrypython/lxc,lazy404/lxc,ysbnim/lxc,hallyn/lxc,ojkastl/lxc_Patches,LynxChaus/lxc,tych0/lxc,efiop/lxc,Ponce/lxc,rowhit/lxc,rowhit/lxc,ojkastl/lxc_Patches,ss1h2a3tw/lxc,lazy404/lxc,rowhit/lxc,ecarrara/lxc,major/lxc,federicobriata/lxc,sapun/lxc,christiaan/lxc,federicobriata/lxc,DarknessBeforeDawn/lxc,hallyn/lxc,thmo/lxc,glensc/lxc,hfuCN/lxc,tych0/lxc,terceiro/lxc,ksperis/lxc,regit/lxc,hkjolhede/lxc,Ponce/lxc,Distrotech/lxc,Pelagicore/lxc,aeris/lxc,christiaan/lxc,federicobriata/lxc,ecarrara/lxc,regit/lxc,ecarrara/lxc,ss1h2a3tw/lxc,lisongmin/lxc,Pelagicore/lxc,rldleblanc/lxc,QingweiPeterLan/cs188-lxc,glensc/lxc,lisongmin/lxc,fwilson42/lxc,codebauss/lxc,jirislaby/lxc,christiaan/lxc,armcc/lxc,aeris/lxc,major/lxc,jirislaby/lxc,thmo/lxc,szaszg/lxc,ysbnim/lxc,jirislaby/lxc,tych0/lxc,JohnPeacockMessageSystems/lxc,ioops/lxc,bmoar/lxc,GreatFruitOmsk/lxc,efiop/lxc,weizhenwei/lxc,efiop/lxc,akshaykarle/lxc,caglar10ur/lxc,rldleblanc/lxc,hkjolhede/lxc,ojkastl/lxc_Patches,caglar10ur/lxc,bostjan/lxc,codebauss/lxc,bostjan/lxc,aeris/lxc,LynxChaus/lxc,virajs/lxc,GreatFruitOmsk/lxc,rldleblanc/lxc,DarknessBeforeDawn/lxc,ksperis/lxc,weizhenwei/lxc,szaszg/lxc,bmoar/lxc,bmoar/lxc,virajs/lxc,yubo/lxc,ss1h2a3tw/lxc,LynxChaus/lxc,lisongmin/lxc,hfuCN/lxc,major/lxc,Pelagicore/lxc,bostjan/lxc,yubo/lxc,Distrotech/lxc,hallyn/lxc,sapun/lxc,cjwatson/lxc,armcc/lxc,JohnPeacockMessageSystems/lxc,hkjolhede/lxc,terceiro/lxc,weizhenwei/lxc,akshaykarle/lxc,cjwatson/lxc,fwilson42/lxc,raspberrypython/lxc,glensc/lxc,fwilson42/lxc,ojkastl/lxc_Patches,armcc/lxc,cjwatson/lxc,ysbnim/lxc,Ponce/lxc,regit/lxc,QingweiPeterLan/cs188-lxc,ksperis/lxc,Distrotech/lxc,lazy404/lxc,thmo/lxc,szaszg/lxc,DarknessBeforeDawn/lxc,ioops/lxc,virajs/lxc,codebauss/lxc,JohnPeacockMessageSystems/lxc,hfuCN/lxc,akshaykarle/lxc,caglar10ur/lxc,terceiro/lxc,ioops/lxc,QingweiPeterLan/cs188-lxc,raspberrypython/lxc,GreatFruitOmsk/lxc,sapun/lxc