V850 breakpoint support

[Andrew Cagney]

Gary Thomas wrote:
> 
> The attached patches are required in order to support breakpoint
> on the NEC/V850 (not V850e).  The major complication is that this
> processor has variable length instructions (16, 32 bits) and the
> "official" illegal instruction [normally used for breakpoints] is
> 32 bits.  Since GDB doesn't handle this very well, an alternate
> solution involving a useless instruction "br *" was chosen.

Yep fine.  Thanks for this one.

	Andrew