Update examples

testsuite/make/null/prog/Main.hs

@@ -0,0 +1,13 @@
+
+-- an example where we want to compile and load a file
+
+import System.Plugins
+import API
+
+main = do 
+    make "../Null.hs" ["-i../api"]
+    m_v  <- load "../Null.o" ["../api"] [] "resource"
+    v <- case m_v of
+        LoadSuccess _ v -> return v
+        _               -> error "load failed"
+    putStrLn ( show (a v) )