Update examples

testsuite/pdynload/univquant/Makefile

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+TEST=   pdynload/univquant
+EXTRA_OBJS=Plugin.o
+TOP=../../..
+include ../../build.mk

testsuite/pdynload/univquant/Plugin.hs

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+module Plugin where
+
+import API
+
+resource = plugin { function = my_id }
+
+my_id :: forall a. a -> a
+my_id x = x

testsuite/pdynload/univquant/api/API.hs

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+module API where
+
+data Interface = Interface { 
+        function :: forall a. a -> a
+}
+
+plugin :: Interface
+plugin = Interface  { function = id }
+

testsuite/pdynload/univquant/prog/Main.hs

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+
+import System.Plugins
+import API
+
+src     = "../Plugin.hs"
+wrap    = "../Wrapper.hs"
+apipath = "../api"
+
+main = do status <- make src ["-i"++apipath]
+          case status of
+                MakeSuccess _ _ -> f
+                MakeFailure e   -> mapM_ putStrLn e
+
+   where f = do v <- pdynload "../Plugin.o" ["../api"] [] "API.Interface" "resource"
+                case v of
+                  LoadSuccess _ a  -> putStrLn "loaded .. yay!"
+                  _             -> putStrLn "wrong types"

testsuite/pdynload/univquant/prog/expected

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+loaded .. yay!