Fix handling of typedef'd function pointers for Go

Add equivalent runtime tests for Python and Java

Examples/test-suite/go/typedef_funcptr_runme.go

@@ -0,0 +1,29 @@
+package main
+
+import . "./typedef_funcptr"
+
+func main() {
+	a := 100
+	b := 10
+
+	if Do_op(a,b,Addf) != 110 {
+		panic(0)
+	}
+	if Do_op(a,b,Subf) != 90 {
+		panic(0)
+	}
+
+	if Do_op_typedef_int(a,b,Addf) != 110 {
+		panic(0)
+	}
+	if Do_op_typedef_int(a,b,Subf) != 90 {
+		panic(0)
+	}
+
+	if Do_op_typedef_Integer(a,b,Addf) != 110 {
+		panic(0)
+	}
+	if Do_op_typedef_Integer(a,b,Subf) != 90 {
+		panic(0)
+	}
+}