adding a new target (m68k-gnu)

[Aymeric Vincent]

>>  I would like to have REGISTER_PREFIX_OPTIONAL set for this target, but

>I don't understand why you want to make this change.  This is normally
>the wrong thing to do for an m68k ELF target.  The macro only exists
>for target with a lot of legacy m68k code which does not use register
>prefixes, but presumably that is not the case for m68k-gnu.

 Well, there is already some assembly typed but it's true that there
aren't plenty of it. Thank you very much for the support, I'll just
add percent-signs (I guess that's the right prefix) to my code... :)
BTW, it's better to have it that way since the people behind the HURD
seem to want it as compatible with Linux as possible...

Thanks again,
Aymeric