Add 'meaning' to Intl.messages

pkg/intl/test/message_extraction/verify_messages.dart

 library verify_messages;
 
 import "print_to_list.dart";
 import "package:unittest/unittest.dart";
 
 verifyResult(ignored) {
   var lineIterator;
   verify(String s) {
     lineIterator.moveNext();
     var value = lineIterator.current;
@@ skipping 48 matching lines @@
   verify('one');
   verify('m');
   verify('f');
   verify('7 male');
   verify('7 Canadian dollars');
   verify('5 some currency or other.');
   verify('1 Canadian dollar');
   verify('2 Canadian dollars');
   verify('1 thing:');
   verify('2 things:');
+  verify('rent');
+  verify('rent');
 
   var fr_lines = expanded.skip(1).skipWhile(
       (line) => !line.contains('----')).toList();
   lineIterator = fr_lines.iterator..moveNext();
   verify("Printing messages for fr");
   verify("Il s'agit d'un message");
   verify("Un autre message avec un seul paramètre hello");
   verify(
       "Caractères qui doivent être échapper, par exemple barres \\ "
       "dollars \${ (les accolades sont ok), et xml/html réservés <& et "
@@ skipping 42 matching lines @@
   verify('un');
   verify('homme');
   verify('femme');
   verify('7 homme');
   verify('7 dollars Canadiens');
   verify('5 certaine devise ou autre.');
   verify('1 dollar Canadien');
   verify('2 dollars Canadiens');
   verify('1 chose:');
   verify('2 choses:');
+  verify('louer');
+  verify('loyer');
+
 
   var de_lines = fr_lines.skip(1).skipWhile(
       (line) => !line.contains('----')).toList();
   lineIterator = de_lines.iterator..moveNext();
   verify("Printing messages for de_DE");
   verify("Dies ist eine Nachricht");
   verify("Eine weitere Meldung mit dem Parameter hello");
   verify(
       "Zeichen, die Flucht benötigen, zB Schrägstriche \\ Dollar "
       "\${ (geschweiften Klammern sind ok) und xml reservierte Zeichen <& und "
@@ skipping 42 matching lines @@
   verify('ein');
   verify('Mann');
   verify('Frau');
   verify('7 Mann');
   verify('7 Kanadischen dollar');
   verify('5 einige Währung oder anderen.');
   verify('1 Kanadischer dollar');
   verify('2 Kanadischen dollar');
   verify('eins:');
   verify('2 Dinge:');
+  verify('mieten');
+  verify('Miete');
 }