[OB PATCH] Fix gnulib/update-gnulib.sh

[Gary Benson]

Gary Benson wrote:
> This commit fixes two paths in update-gnulib.sh that weren't
> updated when gnulib was moved to toplevel.

Tom, even the changes I committed I'm not convinced update-gnulib.sh
is working 100% correctly.  Running it as-is (i.e. "updating" to the
version we already have) changes a bunch of autotools files, and I
can't figure out why.  Could you have a quick look at what it's
changing and let me know if the changes below are something I should
be checking in, or, if not, what it is I need to update cleanly.

Thanks,
Gary