bug#48060: "make check" leaves temporary files after native-comp merge

[Eli Zaretskii]

> Cc: 48060@debbugs.gnu.org
> Date: Tue, 27 Apr 2021 16:53:33 +0000
> From:  Andrea Corallo via "Bug reports for GNU Emacs,
>  the Swiss army knife of text editors" <bug-gnu-emacs@gnu.org>
> 
> I guess the correct way to do it would be in the Makefile when tests are
> done, am I correct?
> 
> The other option would be to have Emacs to clean-up this directory
> before exiting, but in case of a crash it wouldn't work.

We usually do the latter.  Crashes in the test suite should be rare.

> The last option would be to convince `make-temp-file' we call at
> startup.el:553 to create the directory in "/tmp/" or equivalent (not
> sure that's possible).

That's only a good solution on platforms where /tmp is periodically
cleaned up, or even disappears when the user logs off.