Add dart2dart_bot rule.

dart.gyp

Index: dart.gyp
diff --git a/dart.gyp b/dart.gyp
index a40eae5ce827a5954c61b49bb83221ebb61bdced..65a883e8742211bb285b7a8714b73b67c66e49d7 100644
--- a/dart.gyp
+++ b/dart.gyp
@@ -66,6 +66,7 @@
         'runtime/dart-runtime.gyp:dart',
         'utils/compiler/compiler.gyp:dart2js',
         'compiler',
+        'packages'

[Ivan Posva, 2013/04/06 00:09:45]

Please add a TODO or make sure in some other way to remove this on Monday when
the buildbot has been updated.

       ],
       'actions': [
         {
@@ -133,6 +134,17 @@
       ],
     },
     {
+      # This is the target that is built on the dart2dart bots.
+      # It must depend on anything that is required by dart2dart
+      # tests.
+      'target_name': 'dart2dart_bot',
+      'type': 'none',
+      'dependencies': [
+        'create_sdk',
+        'packages',
+      ],
+    },
+    {
       # This is the target that is built on the dartc bots.
       # It must depend on anything that is required by dartc
       # tests.