Set automake flags and CFLAGS
Set automake flags and CFLAGS

Set automake's flags to -Wall -Werror as well as the general
CFLAGS to -Wall and -Werror when building using gcc.

This should catch any regression on build warnings now that we are in
a pretty clean state.

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

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