bug#68996: [PATCH] Respect warnings added in GNU Make 4.4.90

[Eli Zaretskii]

> Date: Thu, 8 Feb 2024 23:27:47 -0800
> Cc: 68996-done@debbugs.gnu.org
> From: Paul Eggert <eggert@cs.ucla.edu>
> 
> I expect the new GNU 'make' behavior will be better for most software 
> projects, as it's likely to catch typos that cause bugs. So let's port 
> to it; it's not hard. To do that, I installed the attached patch into 
> Emacs master. It uses Paul Smith's suggestion, so that 'make' still 
> outputs nicely-indented info.

Thanks, the results look good here.