linux-core support broke i386 compilation

[Daniel Jacobowitz]

You reference a type 'gdb_fpxregset_t'.  It doesn't appear to be defined
anywhere.

I'm also not sure that that's the right #ifdef for the check; PowerPC was
sounding like it would have an fpxregset (well, an xregset, really - no FP
involved) but without PTRACE_GETFPXREGS.  fill_fpxregset also appears to
lack a prototype.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer