Make use of realpath From: Daniel Lezcano <daniel.lezcano@free.fr>
Make use of realpath
From: Daniel Lezcano <daniel.lezcano@free.fr>

The realpath function is more convenient to build the absolute path of
the rootfs.

Signed-off-by: Daniel Lezcano <3211518dd4d87cb3f7ee12cb52e14b7fb2bc0446@fr.ibm.com>

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