bug#24956: 26.0.50; On Windows, setting PATH in compilation-environment has no effect

[Eli Zaretskii]

> From: Noam Postavsky <npostavs@users.sourceforge.net>
> Date: Tue, 22 Nov 2016 17:35:17 -0500
> Cc: Óscar Fuentes <ofv@wanadoo.es>, 24956@debbugs.gnu.org
> 
> Oops. Looking at Fupcase, I had somehow thought that unibyte vs
> multibyte would be a problem (and hence I should use Fcompare_strings
> to hide the details), but actually (as I think you've mentioned
> before) that's not the case for environment variables.
> 
> Here's a new patch.

Looks OK to me, thanks.