[LTP] [PATCH] lib: Migrate tst_get_unused_port to new API

[Petr Vorel]

Hi,

Pushed with following diff:
> -	return TST_GET_UNUSED_PORT(family, type);
> +	printf("%d", TST_GET_UNUSED_PORT(family, type));
> +	return 0;
>  }

Kind regards,
Petr