patch applied (cabal): filter mingw include directories out of rts's installDirs

[Ian Lynagh]

Thu Sep 18 07:29:58 PDT 2008  Ian Lynagh <igloo at earth.li>
  * filter mingw include directories out of rts's installDirs
  GHC < 6.10 put "$topdir/include/mingw" in rts's installDirs. This
  breaks when you want to use a different gcc, so we need to filter
  it out.

    M ./Distribution/Simple/GHC.hs -4 +17

View patch online:
http://darcs.haskell.org/cabal/_darcs/patches/20080918142958-3fd76-70249bc8ac45b353449033583003335587211136.gz