[patch/rfc] Add host's floatformat

[Andrew Cagney]

> For awhile GCC's configure.in had a table like this -- tuned so that
> you could just compile it and grep for strings in the object file.  We
> got rid of it (GCC doesn't need to know the host float format anymore)
> but it could be dug out of CVS.

That's on GDB's wish list.  Change things so that it implements the 
inferior's FP (regardless of the host/target combination).  This whole 
thing was intended as a `temporary' hack.

Andrew