Update examples

testsuite/eval/eval_/Main.hs

@@ -0,0 +1,9 @@
+
+import System.Eval.Haskell
+
+main = do i <- eval_ "Just (7 :: Int)" 
+                     ["Maybe"] 
+                     ["-fglasgow-exts"] 
+                     []
+                     [] :: IO (Either [String] (Maybe (Maybe Int)))
+          print i

testsuite/eval/eval_/Makefile

@@ -0,0 +1,2 @@
+TOP=../../..
+include ../../eval.mk

testsuite/eval/eval_/expected

@@ -0,0 +1 @@
+Right (Just (Just 7))