patch: libiberty pex for _WIN64

[Eli Zaretskii]

> Date: Fri, 3 Aug 2007 19:16:42 -0400
> From: Christopher Faylor <cgf-use-the-mailinglist-please@sourceware.org>
> 
> >2007-08-03  Kai Tietz   <kai.tietz@onevision.com>
> >
> >        * pex-common.h: (pex_funcs): Retyped wait and exec_child to pid_t.
> >        * pex-djgpp.c: Likewise.
> >        * pex-msdos.c: Likewise.
> >        * pex-unix.c: Likewise.
> >        * pex-win32.c: Likewise.
> 
> If long isn't long enough what is pid_t defined to be on _WIN64?

I think it's "long long", as 64-bit Windows uses the P64 model.