bug#36649: 27.0.50; pure space and pdumper

[Eli Zaretskii]

> From: Stefan Monnier <monnier@iro.umontreal.ca>
> Cc: larsi@gnus.org,  pipcet@gmail.com,  36649@debbugs.gnu.org,
>   luangruo@yahoo.com
> Date: Sat, 02 Jul 2022 14:03:29 -0400
> 
> >> Would the patch below be acceptable?
> > No, because it removes purespace unconditionally.
> 
> It does not remove purespace, it just stops using it.

It does that in all builds.  Which is not what I agreed to.  The
unexec build should continue using the purespace.