New "info auxv" command and $auxv variable?

[Andrew Cagney]

> If we start making the CLI more usable by making this stuff available 
>> people might start using it :-)
>> 
>> Anyway, the MI stuff is almost free (the code is common).  The $auxv 
>> variable is a bit tricky but still ok.  Could just add $entrypoint?
> 
> 
> Oops, I misread you.  The MI command is definitely a good idea -
> "-info-auxv", right?

Yep.

> I think $entrypoint is more useful than $auxv.  Should we have a
> reserved namespace for these things?

Ah, that.  Ref: Replace $fp with $frame / $gdbframe / $gdb.frame
http://sources.redhat.com/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gdb&pr=327

Never been a decision.  $ variables are reserved for both builtins and 
registers but the two overlap.  Ok, here's something warped:

	$.auxv

(i.e., "dollar dot auxv" so you know I didn't make a typo :-)

Andrew