SDK build bits for dartfmt.

dart.gyp

Index: dart.gyp
===================================================================
--- dart.gyp	(revision 30995)
+++ dart.gyp	(working copy)
@@ -46,6 +46,7 @@
         'runtime/dart-runtime.gyp:dart',
         'utils/compiler/compiler.gyp:dart2js',
         'utils/pub/pub.gyp:pub',
+        'dartfmt',
         'analyzer',
       ],
       'actions': [
@@ -60,6 +61,7 @@
             '<(SHARED_INTERMEDIATE_DIR)/utils_wrapper.dart.snapshot',
             '<(SHARED_INTERMEDIATE_DIR)/pub.dart.snapshot',
             '<(PRODUCT_DIR)/dartanalyzer/dartanalyzer.jar',
+            '<(SHARED_INTERMEDIATE_DIR)/dartfmt.dart.snapshot',
             'tools/VERSION'
           ],
           'outputs': [
@@ -90,6 +92,13 @@
       ],
     },
     {
+      'target_name': 'dartfmt',
+      'type': 'none',
+      'dependencies': [
+        'utils/dartfmt/dartfmt.gyp:dartfmt',
+      ],
+    },
+    {
       # This is the target that is built on the dart2dart bots.
       # It must depend on anything that is required by dart2dart
       # tests.