Remove warnings in Octave testcase
diff --git a/Examples/test-suite/friends.i b/Examples/test-suite/friends.i
index 2dfee6f..1ba1e5e 100644
--- a/Examples/test-suite/friends.i
+++ b/Examples/test-suite/friends.i
@@ -5,7 +5,12 @@
 
 %warnfilter(SWIGWARN_LANG_IDENTIFIER);
 
-  
+#if defined(SWIGOCTAVE)
+%warnfilter(SWIGWARN_IGNORE_OPERATOR_LSHIFT_MSG) operator<<;
+%warnfilter(SWIGWARN_IGNORE_OPERATOR_RSHIFT_MSG) operator>>;
+#endif
+
+
 %inline 
 {
 
diff --git a/Examples/test-suite/friends_template.i b/Examples/test-suite/friends_template.i
index 48623f2..363e88f 100644
--- a/Examples/test-suite/friends_template.i
+++ b/Examples/test-suite/friends_template.i
@@ -1,5 +1,10 @@
 %module friends_template
 
+#if defined(SWIGOCTAVE)
+%warnfilter(SWIGWARN_IGNORE_OPERATOR_RSHIFT_MSG) operator>>;
+#endif
+
+
 %{
 template <typename Type> class MyClass;