Update examples

testsuite/load/io/prog/Main.hs

@@ -0,0 +1,15 @@
+{-# OPTIONS -cpp #-}
+
+#include "../../../../config.h"
+
+import System.Plugins
+import API
+
+main :: IO ()
+main = do
+        m_v <- load "../TestIO.o" ["../api"] [] "resource"
+        v <- case m_v of
+                LoadFailure _   -> error "load failed"
+                LoadSuccess _ v -> return v
+        s <- field v
+        if null s then print False else print True

testsuite/load/io/prog/expected

@@ -0,0 +1 @@
+True