[ob] Remove a dejagnu ERROR from auxv.exp

[Mark Kettenis]

> Date: Thu, 22 Jun 2006 15:35:07 -0400
> From: Daniel Jacobowitz <drow@false.org>
> 
> If your target does not support gcore at all, then it will currently
> generate an ERROR running auxv.exp.  This turns it into an UNSUPPORTED,
> as was probably intended.

Heh, thanks.  I've been wondering how to fix this properly before, but
decided the easiest way to solve this was to implement gcore on
OpenBSD.  Unfortunately that turned out to be difficult enough that I
didn't manage to do it yet.

Mark