Object Splitting and the Base Package Makefile

[Simon Marlow]

> In a related issue, it seems that in ghc-5.04 libraries *_hsc.o files
> are left out when linking with SplitObjs=YES.

Yes.  Actually it's better to not use #def in .hsc files at all, so that
the *_hsc.o files are empty, and rather put auxiliary definitions in the
appropriate header files.  I've fixed Socket.hsc to do just this.

Cheers,
	Simon