bug#18784: Coultdn't compile emacs-24.4

[Stefan Monnier]

> I think we don't really understand why this bug happens.  At least I
> have no clear idea of how PIE can cause temacs segfault.

I guess if PIE is used in order to place Emacs's code at randomized
addresses (different address every time an Emacs process is launched),
it can break the dump because our subr objects will end up with pointers
to addresses that aren't valid any more (might be other such problems,
but that's the first that comes to my mind).


        Stefan