Patch [darwin specific]: remove incorrect elision of stubs

[Geoff Keating]

Dale Johannesen <dalej@apple.com> writes:

> The Darwin code tried to avoid emitting its stub sequence for callees
> in some cases.
> This is incorrect because it doesn't work with scatter loading (and
> gained
> only a bit of .s and .o file space in any case), and was removed in
> Apple's local
> copy two years ago.  We've managed to miss checking it into FSF all this
> time.  Bootstrapped.  OK?

This is OK.
-- 
- Geoffrey Keating <geoffk@geoffk.org>