[fpc-pascal] Use sleep in thread

[Michael Schnell]

On 02/26/2015 10:50 AM, Marco van de Voort wrote:
> ??? Afaik they are the procedural counterpart of TEvents, and I think 
> that using them is cheaper than sleep, since you only unblock when 
> needed.

??? I _thought_ sleep would just call the appropriate OS function but in 
fact it does

Function  FpNanoSleep  (req : ptimespec;rem : ptimespec):cint; external 
name 'FPC_SYSC_NANOSLEEP';

I don't know what this does.

-Michael