Support GLBIC example.

native_client_sdk/src/examples/hello_world_glibc/helper_functions.cc

+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include <algorithm>
+
+#include "helper_functions.h"
+
+namespace hello_world {
+
+int32_t FortyTwo() {
+  return 42;
+}
+
+std::string ReverseText(const std::string& text) {
+  std::string reversed_string(text);
+  // Use reverse to reverse |reversed_string| in place.
+  std::reverse(reversed_string.begin(), reversed_string.end());
+  return reversed_string;
+}
+}  // namespace hello_world
+