Deprecating and removing old targets

[Paul.Koning@dell.com]

> On Sep 12, 2016, at 3:37 AM, Tristan Gingold <gingold@adacore.com> wrote:
> 
> Hello,
> 
> after a short discussion at the GNU cauldron 2016, I'd like to hear opinion about removing old targets in bfd.
> It is hard to know whether or not they are used, so if you are using an old target please speak up.
> 
> By old target, I mean any non-ELF target for which OS wasn't update in the last 10 years.
> Without a complete search, I think about:
> 
> * all a.out targets
> ...
> Targets I think we should keep:
> * vax
> * z80
> * pdp11

Sounds reasonable.  I'm partial to pdp11.  But isn't pdp11 an a.out target?  

	paul