Add CLOCK_MONOTONIC for RTEMS

[Jeff Johnston]

Joel Sherrill wrote:
>
> Hi,
>
> The attached patch adds CLOCK_MONOTONIC support
> for RTEMS.
>
> 2008-10-16  Joel Sherrill <joel.sherrill@oarcorp.com>
>
>    * libc/include/time.h: Add CLOCK_MONOTONIC.
>    * libc/include/sys/features.h: Define
>    _POSIX_MONOTONIC_CLOCK for RTEMS.
>
> Patch attached.
>
> Thanks.
>
Patch applied.

-- Jeff J.