build: Disable parallel make for SELinux
build: Disable parallel make for SELinux

The makefile provided by selinux-policy-devel is not compatible
with parallel make invocation.

Closes #647
Reviewed-by: Marius Vollmer <bb11c6e942c5cc765df5f04da146b3198127a7a3@redhat.com>

matobet/cockpit,arilivigni/cockpit,nmav/cockpit,vbatts/cockpit,Scribery/cockpit,sgallagher/cockpit,larskarlitski/cockpit,andreasn/cockpit,maxamillion/cockpit,xhad/cockpit,maxamillion/cockpit,fridex/cockpit,mvollmer/cockpit,jscotka/cockpit,Armstrong1992/cockpit,martinpitt/cockpit,michalskrivanek/cockpit,netzvieh/cockpit,mareklibra/cockpit,moraleslazaro/cockpit,firebitsbr/cockpit,netzvieh/cockpit,darioajr/cockpit,larsu/cockpit,stefwalter/cockpit,larskarlitski/cockpit,deryni/cockpit,dperpeet/cockpit,sub-mod/cockpit,petervo/cockpit,kkaempf/cockpit,cockpit-project/cockpit,FireDrunk/cockpit,sgallagher/cockpit,sub-mod/cockpit,jscotka/cockpit,SotolitoLabs/cockpit,haiyangd/cockpit_view,matobet/cockpit,evol262/cockpit,moolitayer/cockpit,firebitsbr/cockpit,garrett/cockpit,maxamillion/cockpit,sgallagher/cockpit,Thermionix/cockpit,garrett/cockpit,matobet/cockpit,evol262/cockpit,garrett/cockpit,netzvieh/cockpit,darioajr/cockpit,evol262/cockpit,michalskrivanek/cockpit,nmav/cockpit,matobet/cockpit,Thermionix/cockpit,petervo/cockpit,arilivigni/cockpit,moolitayer/cockpit,Armstrong1992/cockpit,cockpituous/cockpit,sub-mod/cockpit,SotolitoLabs/cockpit,Scribery/cockpit,jscotka/cockpit,dperpeet/cockpit,haiyangd/cockpit_view,deryni/cockpit,larsu/cockpit,denysvitali/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,xhad/cockpit,FireDrunk/cockpit,andreasn/cockpit,fridex/cockpit,zigitax/cockpit,harishanand95/cockpit,Thermionix/cockpit,harishanand95/cockpit,michalskrivanek/cockpit,garrett/cockpit,mvollmer/cockpit,harishanand95/cockpit,harishanand95/cockpit,maxamillion/cockpit,michalskrivanek/cockpit,Armstrong1992/cockpit,darioajr/cockpit,evol262/cockpit,matobet/cockpit,martinpitt/cockpit,deryni/cockpit,michalskrivanek/cockpit,moraleslazaro/cockpit,fridex/cockpit,vanloswang/cockpit,moolitayer/cockpit,moolitayer/cockpit,mareklibra/cockpit,andreasn/cockpit,kkaempf/cockpit,stefwalter/cockpit,vanloswang/cockpit,xhad/cockpit,dperpeet/cockpit,zigitax/cockpit,larsu/cockpit,fridex/cockpit,deryni/cockpit,denysvitali/cockpit,moraleslazaro/cockpit,matobet/cockpit,martinpitt/cockpit,deryni/cockpit,vbatts/cockpit,deryni/cockpit,denysvitali/cockpit,cockpit-project/cockpit,mareklibra/cockpit,larsu/cockpit,stefwalter/cockpit,vanloswang/cockpit,Scribery/cockpit,mareklibra/cockpit,fridex/cockpit,larskarlitski/cockpit,vanloswang/cockpit,stefwalter/cockpit,arilivigni/cockpit,zigitax/cockpit,maxamillion/cockpit,Thermionix/cockpit,jscotka/cockpit,darioajr/cockpit,mareklibra/cockpit,xhad/cockpit,larskarlitski/cockpit,FireDrunk/cockpit,andreasn/cockpit,vbatts/cockpit,SotolitoLabs/cockpit,larskarlitski/cockpit,fridex/cockpit,garrett/cockpit,netzvieh/cockpit,Scribery/cockpit,Scribery/cockpit,mvollmer/cockpit,petervo/cockpit,harishanand95/cockpit,haiyangd/cockpit_view,cockpit-project/cockpit,arilivigni/cockpit,vbatts/cockpit,harishanand95/cockpit,vbatts/cockpit,stefwalter/cockpit,cockpit-project/cockpit,sub-mod/cockpit,xhad/cockpit,moraleslazaro/cockpit,evol262/cockpit,xhad/cockpit,jscotka/cockpit,FireDrunk/cockpit,haiyangd/cockpit_view,larsu/cockpit,mareklibra/cockpit,dperpeet/cockpit,xhad/cockpit,arilivigni/cockpit,denysvitali/cockpit,SotolitoLabs/cockpit,larskarlitski/cockpit,netzvieh/cockpit,Thermionix/cockpit,cockpituous/cockpit,denysvitali/cockpit,sgallagher/cockpit,nmav/cockpit,vanloswang/cockpit,vbatts/cockpit,petervo/cockpit,dperpeet/cockpit,jscotka/cockpit,cockpituous/cockpit,firebitsbr/cockpit,petervo/cockpit,larskarlitski/cockpit,martinpitt/cockpit,SotolitoLabs/cockpit,larsu/cockpit,moraleslazaro/cockpit,Scribery/cockpit,evol262/cockpit,Thermionix/cockpit,kkaempf/cockpit,martinpitt/cockpit,petervo/cockpit,cockpituous/cockpit,moraleslazaro/cockpit,kkaempf/cockpit,haiyangd/cockpit_view,andreasn/cockpit,zigitax/cockpit,firebitsbr/cockpit,vanloswang/cockpit,cockpit-project/cockpit,arilivigni/cockpit,Armstrong1992/cockpit,kkaempf/cockpit,Armstrong1992/cockpit,firebitsbr/cockpit,deryni/cockpit,nmav/cockpit,FireDrunk/cockpit,sub-mod/cockpit,cockpituous/cockpit,sgallagher/cockpit,harishanand95/cockpit,darioajr/cockpit,Scribery/cockpit,stefwalter/cockpit,mvollmer/cockpit,dperpeet/cockpit,stefwalter/cockpit,andreasn/cockpit,petervo/cockpit,sgallagher/cockpit,andreasn/cockpit,mareklibra/cockpit,vanloswang/cockpit,michalskrivanek/cockpit,sgallagher/cockpit,nmav/cockpit,mvollmer/cockpit,cockpituous/cockpit,arilivigni/cockpit,netzvieh/cockpit,dperpeet/cockpit,moolitayer/cockpit,zigitax/cockpit,moraleslazaro/cockpit,michalskrivanek/cockpit