Add m32c/m32r rtems targets

[DJ Delorie]

I approve the m32c portions.

> Hopefully there is still time to make 2.19 with
> this patch.  Not much to it.
> 
> 2008-10-16    Joel Sherrill <joel.sherrill@oarcorp.com>
> 
>     * bfd/config.bfd: Add m32c-*-rtems* and m32r-*-rtems*.
> 
> 2008-10-16    Joel Sherrill <joel.sherrill@oarcorp.com>
> 
>     * gas/configure.tgt: Add m32c-*-rtems* and m32r-*-rtems*.
> 
> 2008-10-16    Joel Sherrill <joel.sherrill@oarcorp.com>
> 
>     * ld/configure.tgt Add m32c-*-rtems* and m32r-*-rtems*.