Small patch to enable build of gdb-7.6 for GNU/Hurd

[Svante Signell]

On Thu, 2013-05-23 at 11:27 -0600, Tom Tromey wrote:
> >>>>> "Svante" == Svante Signell <svante.signell@gmail.com> writes:
> 
> Svante> Thanks for your prompt reply. The code construct I used was the same as
> Svante> the function defined before in the same source file:
> Svante> int nto_find_and_open_solib (char *solib, unsigned o_flags, char
> Svante> **temp_pathname)
> 
> I guess I don't care that much.
> 
> Svante> How to create a correct ChangeLog entry? Any tools available, emacs?
> 
> Haha, yeah, pretty much only emacs.
> See C-h f add-change-log-entry

A ChangeLog entry is attached (good enough?)

Svante
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2013-05-23  Svante Signell  <svante.signell@gmail.com>

	* nto-tdep.c (nto_init_solib_absolute_prefix): Solve build
	problems for systems not defining PATH_MAX by using alloca
	instead.