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/name_warnings.i

@@ -40,7 +40,9 @@ namespace std
 #endif
     
     virtual ~A() {}
+#ifndef SWIGGO // func is a keyword in Go.
     virtual int func() = 0;
+#endif
   private:
      typedef complex False;
   };