POSIX compatibility change for including wait.h in UNIXProcess_md.c

[Jonathan Lu]

>  I think we forgot to create a bug for this, I've created it now:
>
> 7133301: (process) UNIXProcess_md.c should include sys/wait.h rather than
> wait.h
>

Thanks a lot, Alan!


>
> I don't mind pushing it for you but maybe this is something that Neil
> wants to do?
>
>
Hi Neil, could you please help to push it?


>  -Alan
>

Cheers!
- Jonathan