patch to add QNX NTO i386 support

[Andrew Cagney]

> /* After a watchpoint trap, the PC points to the instruction after
>> >    the one that caused the trap.  Therefore we don't need to step over
> 
> it.
> 
>> >    But we do need to reset the status register to avoid another trap.
> 
> */
> 
>> > #define HAVE_CONTINUABLE_WATCHPOINT
> 
>>
>> Hmm, this poses an interesting problem.  The other i386 targets have
>> this in their nm.h file, since they consider hardware watchpoints as a
>> native-only feature.  However, this isn't necessarily right since we
>> might support hardware breakpoints via the remote protocol.  If you
>> can live with the native-only approach, please move this to your nm.h
>> file.  Otherwise we might need to multi-arch this definition.
> 
> 
> Okay, file that under TODO along with the solib stuff.  We have hardware
> breakpoints on all our remote targets that support them.

Just FYI, this needs to be added to the target vector (target.h) and not 
the architecture vector.

For examples, see STOPPED_BY_WATCHPOINT et.al.  A bit of manipulation of 
the existing nm-*.h files will be needed - have them define the value as 1.

Can you please submit a separate patch that does just this.

Andrew