Add chalk mock

packager/react-packager/src/Activity/__mocks__/chalk.js

@@ -0,0 +1,33 @@
+/**
+ * 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';
+
+const mockColor = () => {
+  return {
+    bold: () => { return { }; },
+  };
+};
+
+mockColor.bold = function() {
+  return {};
+};
+
+module.exports = {
+  dim: s =>  s,
+  magenta: mockColor,
+  white: mockColor,
+  blue: mockColor,
+  yellow: mockColor,
+  green: mockColor,
+  bold: mockColor,
+  red: mockColor,
+  cyan: mockColor,
+  gray: mockColor,
+  black: mockColor,
+};