patch applied (ghc): Don't require the library ghc.mk files in order to clean

[Ian Lynagh]

Fri May 15 16:15:16 PDT 2009  Ian Lynagh <igloo at earth.li>
  * Don't require the library ghc.mk files in order to clean

    M ./Makefile -6 +4
    M ./ghc.mk -7 +17

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20090515231516-3fd76-751dacb26f21eadaab95461dd8d6e312431a2960.gz