perf(frontends/lean/elaborator): replace abstract with abstract_local
perf(frontends/lean/elaborator): replace abstract with abstract_local

Signed-off-by: Leonardo de Moura <7610bae85f2b530654cc716772f1fe653373e892@microsoft.com>

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