[PATCH] Change time_t to 64-bit by default

[Freddie Chopin]

On Thu, 2017-09-07 at 15:58 -0600, Brian Inglis wrote:
> The question is, going forward, should we use long for bigger than
> int values as
> usual, or use time_t instead, to consistently avoid long, in these
> time functions.

I think we should go with time_t, which will be 32-bit or 64-bit long,
depending on what was chosen during newlib compilation.

Regards,
FCh