[Go] Add imtype, goin, goout, godirectorin, and godirectorout

typemaps, to support writing Go code to convert between types.

Examples/test-suite/go/go_director_inout_runme.go

@@ -0,0 +1,32 @@
+package main
+
+import (
+	wrap "./go_director_inout"
+)
+
+type GoMyClass struct {}
+
+func (p *GoMyClass) Adjust(m map[string]interface{}) wrap.GoRetStruct {
+	s := ""
+	for k, v := range m {
+		s += k + "," + v.(string) + ";"
+	}
+	return wrap.GoRetStruct{s}
+}
+
+func main() {
+	a := wrap.NewDirectorMyClass(&GoMyClass{})
+	m := map[string]interface{}{
+		"first": "second",
+	}
+	s := a.Adjust(m)
+	if s.Str != "first,second;" {
+		panic(s)
+	}
+
+	a = wrap.NewDirectorMyClass(nil)
+	s = a.Adjust(m)
+	if s.Str != `{"first":"second"}` {
+		panic(s.Str)
+	}
+}