Update examples

testsuite/hier/hier4/A.hs

@@ -0,0 +1,11 @@
+
+-- now, the question is: is it possible to not depend on a module or
+-- package, but nonetheless have an orphan to it? this could cause
+-- problems....
+
+module A where
+
+import B
+
+u :: Int
+u = undefined