replace fprintf by ERROR call in lxc_unshare.c
replace fprintf by ERROR call in lxc_unshare.c

Do it except for the usage functions that will be removed by another patch

This is a follow on a previous patch that treated
all src/lxc/lxc_*.c but this file.

Signed-off-by: Michel Normand <7b25cf65349c7c025c357f01f5a89ddd77138ac9@fr.ibm.com>
Signed-off-by: Daniel Lezcano <3211518dd4d87cb3f7ee12cb52e14b7fb2bc0446@fr.ibm.com>

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