patch for printing 64-bit values in i386 registers; STABS format

[Andrew Cagney]

>    It's possible to fix this without adding an architecture method, or 
>    implementing location expressions (the penny just dropped).  The basic 
>    problem is the same as for the MIPS - need a custom register area.  Hence:
> 
>    - define a sequence of nameless cooked ([NUM_REGS .. 
>    NUM_REGS+NUM_PSEUDO_REGS) range) registers ordered the way stabs would 
>    like them
>    - modify the existing stabs_regnum_to_regnum to map the messed up 
>    registers onto those values
> 
> Ugh, Yuck!  Yes it works, but isn't this a terrible hack?  Oh and
> using nameless cooked registers means that
> 
>    info address variable
> 
> no longer prints the right thing if variable lives in a register.

Hmm, so that's the command I can never remember.  Fortunatly, I think 
the `unnamed' restriction is removed.  They can be named as GDB should 
now be relying on reggroups to determine which registers are valid where.

Andrew