Make crypto benchmark output compatible with autotest.

src/platform/vboot_reference/tests/sha_benchmark.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.
  */
 
 #include <stdio.h>
 #include <stdlib.h>
 
 #include "sha.h"
 #include "timer_utils.h"
@@ skipping 27 matching lines @@
   /* Iterate through all the hash functions. */
   for(i = 0; i < NUM_HASH_ALGORITHMS; i++) {
     StartTimer(&ct);
     hash_functions[i].hash(buffer, TEST_BUFFER_SIZE, digest);
     StopTimer(&ct);
 
     msecs = GetDurationMsecs(&ct);
     speed = ((TEST_BUFFER_SIZE / 10e6)
              / (msecs / 10e3)); /* Mbytes/sec */
 
-    fprintf(stderr, "%s Time taken = %u ms, Speed = %f Mbytes/sec\n",
+    fprintf(stderr, "# %s Time taken = %u ms, Speed = %f Mbytes/sec\n",
             hash_functions[i].description, msecs, speed);
+    fprintf(stdout, "%s:%f\n",
+            hash_functions[i].description, speed);
   }
 
   Free(digest);
   Free(buffer);
   return 0;
 }