Linux create_sdk GN build for host

utils/dartfmt/BUILD.gn

Index: utils/dartfmt/BUILD.gn
diff --git a/utils/dartfmt/BUILD.gn b/utils/dartfmt/BUILD.gn
new file mode 100644
index 0000000000000000000000000000000000000000..8fec760e9c73884b53826564750162b7e8a278e3
--- /dev/null
+++ b/utils/dartfmt/BUILD.gn
@@ -0,0 +1,14 @@
+# Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
+# for details. All rights reserved. Use of this source code is governed by a
+# BSD-style license that can be found in the LICENSE file.
+
+import("../invoke_dart.gni")
+
+application_snapshot("dartfmt") {
+  dart_root = "../.."
+  main_dart = "../../third_party/pkg_tested/dart_style/bin/format.dart"
+  inputs = exec_script("../../tools/list_files.py",
+                       ["\\.dart\$",
+                       rebase_path("../../third_party/pkg_tested/dart_style")],
+                       "list lines")
+}