Added simplest device mount implementation (includes NullDevice and RandomDevice)

libraries/nacl-mounts/dev/RandomDevice.cc

+/*
+ * Copyright (c) 2012 The Native Client 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 "../dev/NullDevice.h"

[Evgeniy Stepanov, 2012/05/11 08:16:37]

RandomDevice.h

[vissi, 2012/05/11 08:31:05]

Done.

+
+int NullDevice::Read(off_t offset, void *buf, size_t count) {

[Evgeniy Stepanov, 2012/05/11 08:16:37]

RandomDevice

[vissi, 2012/05/11 08:31:05]

Done.

+  int nread;
+  get_random_bytes_(buf, count, &nread);
+  return nread;
+}
+int Write(off_t offset, const void *buf, size_t count) {
+  return EPERM;
+}
+