lxc-alpine: add support for setting arch from command line
lxc-alpine: add support for setting arch from command line

This allows us to lxc-create 32 bit guests on x86_64 hosts.

Signed-off-by: Natanael Copa <d6dfbe96822fc6f407d114112670f8d1571509f1@alpinelinux.org>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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