Update examples

testsuite/pdynload/spj1/Plugin.hs

@@ -0,0 +1,17 @@
+module Plugin where
+
+-- user doesn't import the API
+-- and provides a polymorphic value
+
+-- import API
+-- resource :: Interface
+
+--
+-- should pass type check, and dump core
+--
+-- resource :: Num a => a
+
+-- import API
+
+resource :: Num a => a
+resource = 7