[PATCH] [ms-cxxabi] Fix the base/complete dtor logic.

[Timur Iskhodzhanov]

  > you'll notice that `??1B@@UAE at XZ` is `B::~B`
  > and `??_DB@@QAEXXZ` is `B::'vbase destructor'`.

  I've forgotten to add the emphasis: `?1B@` does not mean "B base destructor", it really just means "B destructor".
  Well, you can tell it is a "B base destructor", but with a slightly different meaning of "base" (not only a base class but also "B basic/simple destructor").

http://llvm-reviews.chandlerc.com/D823