bug#61960: 30.0.50; Unexec build reliably crashes during loadup

[Eli Zaretskii]

> Cc: 61960@debbugs.gnu.org
> From: Konstantin Kharlamov <hi-angel@yandex.ru>
> Date: Sun, 05 Mar 2023 01:08:31 +0300
> 
> Btw, that makes me wonder how important is that to fix the unexec build at 
> all, given it will be off when native compilation is on. Native compilation 
> makes code faster so supposed to be the future. So presumably people will 
> always be running with enabled, thus the unexec() path would be unused.

We decided not to drop the unexec support just yet.  So we'd like to
keep it working for now.