RFA: Use .opt files for the FR-V port

[Aldy Hernandez]

>        (a) keep them in the --help output with the same string,
>        (b) keep them in the --help output with the default
>            "undocumented" string.
>        (c) keep them in the --help output with a more descriptive text.
>        (d) drop them from the --help output altogether
> 
>      I decided to go with (d) for the -mdebug* switches since they're
>      of no use to anyone that isn't actively working on gcc.  I went with
>      (c) for the TARGET_OPTIONS stuff because a knowledgable user might
>      want to try them and because they're probably more useful than some
>      of the "fully documented" switches (like -mfixed-cc, for example).

I'd prefer (c) for the -mdebug* switches, but don't let that stop you
from committing the patch :-).

> testcase and making sure it had the intended effect.  OK to install?

Yes.

Aldy