Update examples

testsuite/pdynload/null/Makefile

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+
+TEST=   pdynload/null
+TOP=../../..
+include ../../build.mk

testsuite/pdynload/null/Plugin.hs

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+module Plugin where
+
+import API
+
+resource = D 1

testsuite/pdynload/null/api/API.hs

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+
+module API where
+
+data Num t => Interface t = D t
+

testsuite/pdynload/null/prog/Main.hs

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+
+import System.Plugins
+-- import System.Plugins.Utils
+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     <- load "../Plugin.o" ["../api"] [] "resource"
+                --  (i,_) <- exec "ghc" ["--numeric-version"]
+                --  mapM_ putStrLn i
+                putStrLn "done."
+

testsuite/pdynload/null/prog/expected

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+done.