patch applied (ghc): Allow GNU-standard --host, --build, --target configure options (#3637)

[Simon Marlow]

Tue Jan 19 02:28:19 PST 2010  Simon Marlow <marlowsd at gmail.com>
  * Allow GNU-standard --host, --build, --target configure options (#3637)
  Patch contributed by asuffield at suffields.me.uk

    M ./aclocal.m4 +92
    M ./configure.ac -18 +56

View patch online:
http://darcs.haskell.org/ghc/_darcs/patches/20100119102819-12142-c104e27b1bf00daa8a1c7d776a3ec439d459e083.gz