Get back 100% in sync with fb codebase

jestSupport/preprocessor.js

@@ -0,0 +1,17 @@
+/**
+ * Copyright (c) 2015-present, Facebook, Inc.
+ * All rights reserved.
+ *
+ * This source code is licensed under the BSD-style license found in the
+ * LICENSE file in the root directory of this source tree. An additional grant
+ * of patent rights can be found in the PATENTS file in the same directory.
+ */
+'use strict';
+
+var transformer = require('../packager/transformer.js');
+
+module.exports = {
+  process(src, file) {
+    return transformer.transform(src, file).code;
+  }
+};