apparmor: silence 'silent' mount denials
apparmor: silence 'silent' mount denials

newer lxc uses 'silent' when remounting on shutdown.  Silence that denial too

Author: Jamie Strandboge <b4dde37aa2aac745c0e6c43447507eaeace3e59f@canonical.com>
Signed-off-by: Serge Hallyn <3df611b026e4639bee8aef7a4beb2e39fcebb313@ubuntu.com>
Acked-by: Stéphane Graber <089afc6d81f66f1168a9849e15660feae286e024@ubuntu.com>

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