feat(bin/linja): return exitcode from ninja and lean
feat(bin/linja): return exitcode from ninja and lean

fix #120

dselsam/lean,avigad/lean,fpvandoorn/lean2,digama0/lean,UlrikBuchholtz/lean,rlewis1988/lean,leanprover-community/lean,htzh/lean,fpvandoorn/lean,fpvandoorn/lean,UlrikBuchholtz/lean,leodemoura/lean,Kha/lean,johoelzl/lean,eigengrau/lean,soonhokong/lean-windows,digama0/lean,fpvandoorn/lean2,UlrikBuchholtz/lean,fpvandoorn/lean2,c-cube/lean,leodemoura/lean,javra/lean,soonhokong/lean-osx,digama0/lean,levnach/lean,fgdorais/lean,soonhokong/lean-windows,rlewis1988/lean,soonhokong/lean-osx,fgdorais/lean,avigad/lean,leanprover-community/lean,soonhokong/lean-windows,Kha/lean,javra/lean,soonhokong/lean,eigengrau/lean,leanprover/lean,soonhokong/lean,sp3ctum/lean,sp3ctum/lean,dselsam/lean,c-cube/lean,leanprover/lean,levnach/lean,avigad/lean,dselsam/lean,dselsam/lean,dselsam/lean,soonhokong/lean-osx,leodemoura/lean,levnach/lean,soonhokong/lean-osx,soonhokong/lean,Kha/lean,soonhokong/lean,rlewis1988/lean,fpvandoorn/lean2,Kha/lean,fpvandoorn/lean2,avigad/lean,leanprover/lean,leanprover/lean,johoelzl/lean,soonhokong/lean-osx,eigengrau/lean,soonhokong/lean-windows,javra/lean,fgdorais/lean,fpvandoorn/lean,leanprover-community/lean,leanprover/lean,leanprover-community/lean,sp3ctum/lean,eigengrau/lean,Kha/lean,digama0/lean,fgdorais/lean,johoelzl/lean,avigad/lean,UlrikBuchholtz/lean,leanprover-community/lean,johoelzl/lean,eigengrau/lean,johoelzl/lean,digama0/lean,soonhokong/lean-windows,javra/lean,c-cube/lean,UlrikBuchholtz/lean,avigad/lean,rlewis1988/lean,rlewis1988/lean,dselsam/lean,htzh/lean,leodemoura/lean,leodemoura/lean,johoelzl/lean,fpvandoorn/lean,javra/lean,fgdorais/lean,levnach/lean,htzh/lean,htzh/lean,fpvandoorn/lean,rlewis1988/lean,leanprover/lean,sp3ctum/lean,leanprover-community/lean,fpvandoorn/lean,sp3ctum/lean,fgdorais/lean,soonhokong/lean,c-cube/lean,levnach/lean,htzh/lean,c-cube/lean,leodemoura/lean,Kha/lean,digama0/lean