bug#46256: [feature/native-comp] AOT eln files ignored if run from build tree

[Eli Zaretskii]

> From: Andrea Corallo <akrl@sdf.org>
> Cc: pipcet@gmail.com, 46256@debbugs.gnu.org, andrewjmoreton@gmail.com
> Date: Tue, 09 Mar 2021 07:03:01 +0000
> 
> > Can you tell why are we loading the same .eln files more than once?
> 
> I guess `load' was called two times on the same filename.

Is this likely to happen?  Our code generally uses 'require', which
should avoid that.

> > What are the reasons for unloading a .eln file which was once loaded
> > into a session?
> 
> All the functions defined in it are not anymore reachable (read all
> symbols functions are makunbound or defined to some other function).

That means someone did unload-feature, right?  Again, unlikely.