Add support for the Go programming language.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@12108 626c5289-ae23-0410-ae9c-e8d60b6d4f22

Examples/test-suite/go/overload_extend_runme.go

@@ -0,0 +1,22 @@
+package main
+
+import "./overload_extend"
+
+func main() {
+	f := overload_extend.NewFoo()
+	if f.Test().(int) != 0 {
+		panic(0)
+	}
+	if f.Test(3).(int) != 1 {
+		panic(0)
+	}
+	if f.Test("hello").(int) != 2 {
+		panic(0)
+	}
+	if f.Test(float64(3), float64(2)).(float64) != 5 {
+		panic(0)
+	}
+	if f.Test(float64(3.0)).(float64) != 1003 {
+		panic(0)
+	}
+}