[fpc-pascal] detect CPU cores

[Marco van de Voort]

In our previous episode, Sven Barth said:
> > Considering that the implementation is currently "Result := 1" for any
> > target that is no surprise ;)
> 
> I've now implemented GetCPUCount for all Windows targets.

.. updating...

>  For the BSD's 
> I'd use sysctl, which would mean that I'd need to duplicate sysctl() 

Why not simply use fpsysctl in unit sysctl?

> and  the necessary constants/types...

Yes. The FreeBSD ones are probably 5.x. Bonus points if you can haul those
constants through h2pas!