Fixed warning with the flag -fwarn-missing-import-lists.

Hi, Using the flag -fwarn-missing-import-lists with cabal-install the line import Data.Version (Version(..)) in the generated module Paths_xxx.hs yields a warning due to the use of the (..) form of import (see http://hackage.haskell.org/trac/ghc/ticket/4489 ). The attached patch fix this issue. Best regards, -- Andrés