[rfa, doc] Remove warning about "unstable" Target Descriptions format

[Ulrich Weigand]

Eli Zaretskii wrote:
> > Date: Wed, 29 Jun 2011 14:27:54 +0200 (CEST)
> > From: "Ulrich Weigand" <uweigand@de.ibm.com>
> > Cc: gdb-patches@sourceware.org
> > 
> > Eli, is the doc change OK?
> 
> Yes, thanks.

Checked in, thanks!

Bye,
Ulrich

-- 
  Dr. Ulrich Weigand
  GNU Toolchain for Linux on System z and Cell BE
  Ulrich.Weigand@de.ibm.com