Add BringToWaving to dynamic demo speech cfg

psGrammar/demos/demoDynamic.jsgf

@@ -28,4 +28,7 @@ public <command> = [<robot>] ( <save> | <wave> | <who> | <goTo> | <followMe> | <
 
 <trash> = ([please] ((take out the trash) | (take out the garbage)));
 <search> = ([please] search for [a] [waving] person);
-<difference> = (spot the difference);
\ No newline at end of file
+<difference> = (spot the difference);
+
+<bring> = ([please] (bring) [the] <bringObject> (to a waving person));
+<bringObject> = (coke | drink | beer);