Fix test grammars for GHC 7.0

Author: knothed

packages/test/data/monaderror-explist.y

@@ -1,5 +1,5 @@
 {
-{-# LANGUAGE FunctionalDependencies, FlexibleInstances #-}
+{-# LANGUAGE FunctionalDependencies, FlexibleInstances, MultiParamTypeClasses #-}
 module Main where
 
 import Data.Char

packages/test/data/monaderror.y

@@ -1,5 +1,5 @@
 {
-{-# LANGUAGE FunctionalDependencies, FlexibleInstances #-}
+{-# LANGUAGE FunctionalDependencies, FlexibleInstances, MultiParamTypeClasses #-}
 module Main where
 
 import Control.Monad (when)

packages/test/data/typeclass_monad_lexer.y

@@ -1,5 +1,5 @@
 {
-{-# LANGUAGE FunctionalDependencies, FlexibleInstances, UndecidableInstances #-}
+{-# LANGUAGE FunctionalDependencies, FlexibleInstances, UndecidableInstances, MultiParamTypeClasses #-}
 import Control.Monad (liftM, ap)
 import Control.Applicative as A
 }