bug#36405: 26.2.90; O_PATH problem on some versions of Cygwin

[Eli Zaretskii]

> From: Ken Brown <kbrown@cornell.edu>
> CC: "36405@debbugs.gnu.org" <36405@debbugs.gnu.org>
> Date: Sat, 29 Jun 2019 18:03:02 +0000
> 
> > Thanks, this is fine with me if it does the job.  Ken?
> 
> Fine with me too, after a small tweak.  Revised patch attached.

Go ahead and push, then.

Thanks.