add explicit stream operator

testtools/source/bridgetest/multi.cxx

@@ -50,6 +50,11 @@ struct CheckFailed {
     rtl::OUString message;
 };
 
+::std::ostream& operator<< (::std::ostream& os, const ::rtl::OUString& str)
+{
+    return os << ::rtl::OUStringToOString(str, RTL_TEXTENCODING_UTF8).getStr();
+}
+
 template< typename T > void checkEqual(T const & value, T const & argument) {
     if (argument != value) {
         std::ostringstream s;