Change intl to use new pub layout

pkg/intl/lib/date_symbol_data_file.dart

Index: pkg/intl/lib/date_symbol_data_file.dart
===================================================================
--- pkg/intl/lib/date_symbol_data_file.dart	(revision 12504)
+++ pkg/intl/lib/date_symbol_data_file.dart	(working copy)
@@ -10,12 +10,12 @@
 #library('date_symbol_data_json');
 
 #import("date_symbols.dart");
-#import("lib/lazy_locale_data.dart");
-#import('lib/date_format_internal.dart');
-#import('lib/file_data_reader.dart');
+#import("src/lazy_locale_data.dart");
+#import('src/date_format_internal.dart');
+#import('src/file_data_reader.dart');
 #import('dart:io');
 
-#source("data/dates/localeList.dart");
+#source("src/data/dates/localeList.dart");
 
 /**
  * This should be called for at least one [locale] before any date formatting