[rfa] libgdb updates to doco

[Andrew Cagney]

> That's just a cookbook.  It's important to have that, but it is no
> less important to understand how multi-arch works internally, to be
> able to do something beyond blindly following the cookbook.


Hmm, not sure if you want the doco to explain how it currently works - 
the swap stuff is a really nasty paramatic hack.  How it _should_ work 
might be useful.  I think its like libgdb - in theory it works like ..., 
when working on the reality, try to keep the theory in mind and try to 
make the code more like the theory :-)

	Andrew