Fix moxie libgloss issues with c99

[Jeff Johnston]

Please go ahead.

-- Jeff J.

On Thu, Dec 14, 2023 at 2:26 PM Jeff Law <jeffreyalaw@gmail.com> wrote:

>
> Two libgloss issues specific to moxie-elf that show up build with GCC
> trunk.
>
> First, putnum.c uses "print" without a prototype.  So I added one based
> on the function's definition in print.c.  Second sim-inbyte.c uses read,
> which comes from unistd.h, so this adds a suitable #include.
>
> OK for the trunk?
>
> Jeff
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