Non-SFI Mode: Build libevent with PNaCl toolchain for nacl_helper_nonsfi.

third_party/libevent/nacl_nonsfi/random.c

+/* Copyright 2014 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 <stdlib.h>
+
+/* The newlib-based PNaCl toolchain does not provide random(). So, here we
+ * define it. It just redirects to the rand(), which is provided by the
+ * toolchain. */
+int random() {
+  return rand();
+}