lxc-ubuntu-cloud: Update arm* cross
lxc-ubuntu-cloud: Update arm* cross

| host arch | arm64 | armhf | armel |
-------------------------------------
| arm64     |   X   |   X   |   X   |
| armhf     |       |   X   |   X   |
| armel     |       |   X   |   X   |
-------------------------------------

Although optional, all existing arm64 silicon supports 32bit instructions.
armel/armhf is only a userspace change, so they are interchangeable.
However armhf isn't supported on all armel platforms (e.g. armv6) but
all those we support have hard-float.

Signed-off-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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