const std::string reference throws typemap test added

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@6052 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Examples/test-suite/lib_std_string.i

@@ -41,6 +41,12 @@ void test_throw() throw(std::string){
   throw x;
 }
 
+void test_const_reference_throw() throw(const std::string &){
+  static std::string x = "x";
+  
+  throw x;
+}
+
 %}