Change intl to use new pub layout

pkg/intl/example/basic/basic_example.dart

Index: pkg/intl/example/basic/basic_example.dart
===================================================================
--- pkg/intl/example/basic/basic_example.dart	(revision 12515)
+++ pkg/intl/example/basic/basic_example.dart	(working copy)
@@ -19,10 +19,10 @@
 // These can be replaced with package:intl/... references if using this in
 // a separate package.
 // TODO(alanknight): Replace these with package: once pub works in buildbots.
-#import('../../date_format.dart');
-#import('../../date_symbol_data_local.dart');
-#import('../../intl.dart');
-#import('../../message_lookup_local.dart');
+#import('../../lib/date_format.dart');
+#import('../../lib/date_symbol_data_local.dart');
+#import('../../lib/intl.dart');
+#import('../../lib/message_lookup_local.dart');
 #import('messages_all.dart');
 
 Function doThisWithTheOutput;