fix(util/stackinfo): saving max stack size on OSX
fix(util/stackinfo): saving max stack size on OSX

see issue #628

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