[RFA] Update README post gdb-6.5 branch creation

[Joel Brobecker]

> > 2006-05-16  Joel Brobecker  <brobecker@adacore.com>
> > 
> >         * README: Update GDB version number.
> > 
> > What do you guys think?
> 
> For at least the last couple of releases, this file has just gotten
> sedded.  Should we have a README.in instead?  It would still need to be
> proofread at some point on the release checklist - but GCC has adopted
> a strict "version number in one place only" policy and it seems to be
> quite helpful.

I think this is a very good idea.

-- 
Joel