fopen_cloexec: simplify open call
fopen_cloexec: simplify open call

Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>

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