patch applied (packages/base): Move Integer out into its own package

[Don Stewart]

dons:
> igloo:
> > Sun Mar 23 11:13:42 PDT 2008  Ian Lynagh <igloo at earth.li>
> >   * Move Integer out into its own package
> >   We now depend on the new integer package.
> >   We also depend on a new ghc-prim package, which has GHC.Prim,
> >   GHC.PrimopWrappers, and new modules GHC.Bool and GHC.Generics,
> >   containing Bool and Unit/Inl/Inr respectively.
> 
> Wow. Great idea.

P.S.  I hope the cross package optimisations are working properly :)

-- Don