[PATCH] update-netbsd.sh: fix script name, update year range in copyright.

[Frederic Cambus]

On Mon, Apr 19, 2021 at 01:59:01PM -0600, Tom Tromey wrote:
> >>>>> "Frederic" == Frederic Cambus <fred@statdns.com> writes:
> 
> Frederic> gdb/ChangeLog:
> Frederic> 	* syscalls/update-netbsd.sh: Fix script name display in usage, and
> Frederic> 	update year range in generated copyright notices.
> 
> Thank you, this looks good to me.  Could use the obvious rule for this
> one.  If you need me to check it in for you, let me know and I will.

Yes, it would be nice if you could get it in, as I don't have commit
access.

Thanks in advance.