[PATCH 1/4] gnulib: import chown

[Eli Zaretskii]

> From: Tom Tromey <tom@tromey.com>
> Date: Mon, 07 Jun 2021 08:23:50 -0600
> 
> >>>>> "Mike" == Mike Frysinger via Gdb-patches <gdb-patches@sourceware.org> writes:
> 
> Mike> A few sims use this to emulate chown syscalls.
> 
> Looks good.

AFAICT, the Gnulib emulation always returns a failure status in the
MinGW port, is that okay for the callers of chown?  Perhaps a better
alternative is to silently do nothing on MS-Windows?