patch applied (ghc): Tweak to the directory-building rule

[Simon Marlow]

Fri Nov 13 04:57:19 PST 2009  Simon Marlow <marlowsd at gmail.com>
  * Tweak to the directory-building rule
  Ignore-this: b9e1fe6bcbfd4ff56905517f32b646f7
  So we don't try to recreate directories just because they are older
  than mkdirhier, since mkdirhier won't touch them.

    M ./ghc.mk -1 +5

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20091113125719-12142-1d251a6c8ea17587a70902b227dc3d69ca6b98d3.gz