patch applied (packages/HaXml): need a secondary .cabal file to deal with new pkg deps

[Malcolm Wallace]

> >   * need a secondary .cabal file to deal with new pkg deps
> >     A ./HaXml-darcs.cabal
> 
> Unfortunately Cabal doesn't work with more than one .cabal file in a
> directory.

Ouch.  I didn't know that.  Are there any workarounds?  Or do we just
need to wait for Cabal configurations to be implemented?

(Random thought: why couldn't Setup.hs take the .cabal file as an extra
optional argument?)

Regards,
    Malcolm