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/director_extend_runme.go

@@ -0,0 +1,18 @@
+// Test case from bug #1506850 "When threading is enabled, the
+// interpreter will infinitely wait on a mutex the second time this
+// type of extended method is called.  Attached is an example program
+// that waits on the mutex to be unlocked."
+
+package main
+
+import . "./director_extend"
+
+func main() {
+	m := NewSpObject()
+	if m.Dummy() != 666 {
+		panic("1st call")
+	}
+	if m.Dummy() != 666 {
+		panic("2nd call")
+	}
+}