patch applied (ghc): Add xhtml package (a new dependency of Haddock; not installed/shipped)

[Simon Marlow]

Wed Jun  2 02:01:01 PDT 2010  Simon Marlow <marlowsd at gmail.com>
  * Add xhtml package (a new dependency of Haddock; not installed/shipped)

    M ./ghc.mk -1 +5
    M ./packages +1

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=ghc;a=darcs_commitdiff;h=20100602090101-12142-29c6d9c28c9be44c83cdad74d49bbdf921cca657.gz