Cleanup gypi mess.

runtime/platform/platform_sources.gypi

Index: runtime/platform/platform_sources.gypi
diff --git a/runtime/platform/platform_sources.gypi b/runtime/platform/platform_sources.gypi
new file mode 100644
index 0000000000000000000000000000000000000000..8f97acdb6a50a2f1b304cdfefe952e08609ab0fe
--- /dev/null
+++ b/runtime/platform/platform_sources.gypi
@@ -0,0 +1,12 @@
+# Copyright (c) 2012, 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.
+
+# This file contains sources shared between the vm and bin components.
+{
+  'sources': [
+    'globals.h',
+    'c99_support_win.h',
+    'inttypes_support_win.h',
+  ],
+}