sys/time.h additions

[J. Johnston]

Joel Sherrill wrote:
> 
> We are close to the point where I am going to have to submit a
> lump. :)
> 
> But for now, this simply adds macros such as "timerisset, timerclear,
> timercmp, timeradd, etc. from BSD for RTEMS specific targets.
> 
> 2000-12-01      Joel Sherrill <joel@OARcorp.com>
> 
>         * libc/include/sys/time.h: Added BSD timer manipulation macros
>         used by RTEMS code.  These are currently within an RTEMS
> conditional.
> 

Patch checked in.

-- Jeff J.