filter mingw include directories out of rts's installDirs
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.

20080918142958-3fd76-70249bc8ac45b353449033583003335587211136.gz

dcreager/cabal,dcreager/cabal