fix configure.ac for seccomp and apparmor
fix configure.ac for seccomp and apparmor

Use --enable-XXX=check when not specified to get reasonable defaults.

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

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