fix(util/memory): add C++14 sized delete operators
fix(util/memory): add C++14 sized delete operators

Fixes #1044

Kha/lean,johoelzl/lean,johoelzl/lean,leanprover-community/lean,leodemoura/lean,digama0/lean,soonhokong/lean-osx,soonhokong/lean-osx,johoelzl/lean,leanprover/lean,fgdorais/lean,leanprover/lean,digama0/lean,fpvandoorn/lean,soonhokong/lean-windows,leodemoura/lean,johoelzl/lean,soonhokong/lean-windows,fpvandoorn/lean,fgdorais/lean,avigad/lean,Kha/lean,dselsam/lean,digama0/lean,soonhokong/lean-windows,Kha/lean,dselsam/lean,fpvandoorn/lean,digama0/lean,soonhokong/lean-windows,Kha/lean,leanprover-community/lean,rlewis1988/lean,dselsam/lean,leodemoura/lean,dselsam/lean,rlewis1988/lean,leanprover-community/lean,leanprover/lean,soonhokong/lean-osx,leanprover/lean,leodemoura/lean,leanprover/lean,soonhokong/lean-windows,rlewis1988/lean,fpvandoorn/lean,leanprover-community/lean,Kha/lean,soonhokong/lean-osx,rlewis1988/lean,fpvandoorn/lean,leanprover-community/lean,fgdorais/lean,digama0/lean,leanprover-community/lean,rlewis1988/lean,avigad/lean,fgdorais/lean,leodemoura/lean,fgdorais/lean,Kha/lean,avigad/lean,leanprover/lean,soonhokong/lean-osx,avigad/lean,avigad/lean,dselsam/lean,avigad/lean,johoelzl/lean,dselsam/lean,fpvandoorn/lean,fgdorais/lean,digama0/lean,johoelzl/lean,leodemoura/lean,rlewis1988/lean