Rearrange vboot_reference directories to isolate external components.

src/platform/vboot_reference/vboot_firmware/lib/cryptolib/rsa_utility.c

 /* Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  *
  * Implementation of RSA utility functions.
  */
 
 #include "cryptolib.h"
 #include "utility.h"
 
@@ skipping 113 matching lines @@
     verification_key = (RSAPublicKey*) key;  /* Supress const warning. */
   else
     return 0; /* Both can't be NULL or non-NULL. */
 
   success = RSAVerify(verification_key, sig, sig_size, algorithm, digest);
 
   if (!key)
     RSAPublicKeyFree(verification_key);  /* Only free if we allocated it. */
   return success;
 }