Fix Makefile after flex.go was moved
Fix Makefile after flex.go was moved

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

akshaykarle/lxd,smoser/lxd,beni55/lxd,akshaykarle/lxd,jsavikko/lxd,dvbportal/osx-lxd,jsavikko/lxd,erikmack/lxd,benaryorg/lxd,sl1pm4t/lxd,stgraber/lxd,georghopp/lxd,chrisglass/lxd,rcj4747/lxd,Skarlso/lxd,erikmack/lxd,chrisglass/lxd,mjeanson/lxd,achanda/lxd,benaryorg/lxd,jsavikko/lxd,stgraber/lxd,techtonik/lxd,Skarlso/lxd,jensg-st/lxd,dustinkirkland/lxd,beni55/lxd,lxc/lxd,dustinkirkland/lxd,basvanbeek/lxd,rcj4747/lxd,stgraber/lxd,yura-pakhuchiy/lxd,rrva/lxd,hallyn/lxd,hallyn/lxd,ollie314/lxd,ollie314/lxd,dustinkirkland/lxd,georghopp/lxd,atxwebs/lxd,atxwebs/lxd,lxc/lxd,stgraber/lxd,jumpstarter-io/lxd,mikemccracken/lxd,basvanbeek/lxd,lxc/lxd,erikmack/lxd,sl1pm4t/lxd,stgraber/lxd,techtonik/lxd,rrva/lxd,beni55/lxd,tych0/lxd,Malizor/lxd,chrisglass/lxd,Malizor/lxd,sl1pm4t/lxd,mjeanson/lxd,mikemccracken/lxd,dvbportal/osx-lxd,mikemccracken/lxd,lxc/lxd,hallyn/lxd,akshaykarle/lxd,jumpstarter-io/lxd,stgraber/lxd,ericsnowcurrently/lxd,stgraber/lxd,benaryorg/lxd,rrva/lxd,basvanbeek/lxd,Malizor/lxd,tych0/lxd,hallyn/lxd,lxc/lxd,jensg-st/lxd,georghopp/lxd,techtonik/lxd,hallyn/lxd,smoser/lxd,tych0/lxd,atxwebs/lxd,pcdummy/lxd,atxwebs/lxd,ollie314/lxd,ericsnowcurrently/lxd,hallyn/lxd,mjeanson/lxd,lxc/lxd,lxc/lxd,Skarlso/lxd,Skarlso/lxd,achanda/lxd,smoser/lxd,ericsnowcurrently/lxd,rcj4747/lxd,yura-pakhuchiy/lxd,pcdummy/lxd,jensg-st/lxd,pcdummy/lxd,jumpstarter-io/lxd,yura-pakhuchiy/lxd,dvbportal/osx-lxd,achanda/lxd