New targets to Binutils for H8 series

[Kazu Hirata]

Hi Shrinivas,

> 1. I feel, we should add two new targets in the GCC and Binutils for H8S 
>    and H8/300H normal mode. e.g. "h8300hn" and "h8300sn". 
>    Existing ".h8300h" and ".h8300s" will denote advanced mode. 
>    These targets will be automatically used when -mn switch is 
>    used while compiling the file.

I think this is a good idea.

> This will need few changes in GCC and major changes in Binutils. 
> Also corresponding changes in the GDB/Simulator will have to be made.

I don't know much about binutils, but isn't it relatively
straightforward to add a new magic number depending on command line
options (at least for COFF)?

Kazu Hirata