patch applied (ghc): Use dlltool from the in-tree mingw installation

[Ian Lynagh]

Tue Dec  1 11:05:44 PST 2009  Ian Lynagh <igloo at earth.li>
  * Use dlltool from the in-tree mingw installation
  We only use dlltool on Windows, and this way we don't require that
  the user has it installed.

    M ./configure.ac -15
    M ./mk/config.mk.in -1 +1

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20091201190544-3fd76-f3547a7f99b2d116dca48c54387ad7fff6a5c7ae.gz