patch applied (ghc): Add some -no-user-package-conf flags

[Ian Lynagh]

Thu Sep  2 15:47:26 PDT 2010  Ian Lynagh <igloo at earth.li>
  * Add some -no-user-package-conf flags
  Stops user-installed packages breaking the build

    M ./aclocal.m4 -1 +1
    M ./rules/package-config.mk +1
    M ./utils/ghc-cabal/ghc.mk +1
    M ./utils/ghc-pkg/ghc.mk +1

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100902224726-3fd76-b40c97c519557198b51a0c47c6746fa1ca471b89.gz