[Yhc] make_tuple for arbitrary number of elements

[Thomas Shackell]

> Heh.  You wrote me a patch - now I feel bad.  :)  After reading your 
> email I decided that I definitely should implement it (System.Time) 
> through the FFI that's already there.

No need to feel bad, I enjoyed it and it only took me 10 minutes, it's 
also a bit of a tidy up in many ways.

If you're adding things which are primitive parts of the standard 
prelude then I would recommend at looking at:
	- src/packages/yhc-base-1.0/YHC/Primitive.hs
  	- src/runtime/BCKernel/primitive.h
	- src/runtime/BCKernel/primitive.c
	- src/runtime/BCKernel/builtin

Some of the files in builtin are more closely tied to the runtime than 
others. Array.c, IO.c and System.c are fairly good examples of generic 
ones. Indeed System.c is probably the most sensible place for 
System.Time functions.

> I'll try to find an excuse to use the make_ntuple.  Thanks and kudos for 
> the speedy response.

It'll be useful if you really need a function to return several 
different results, for example primIntegerQuotRem. However you don't 
need to try to use it ;-)

Thanks

Topm