Make SHA benchmark output follow convention.

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"
 #include "utility.h"
 
 #define NUM_HASH_ALGORITHMS 3
 #define TEST_BUFFER_SIZE 4000000
 
 /* Table of hash function pointers and their description. */
 typedef uint8_t* (*Hashptr) (const uint8_t*, int, uint8_t*);
 typedef struct HashFxTable {
   Hashptr hash;
   char* description;
 } HashFxTable;
 
 HashFxTable hash_functions[NUM_HASH_ALGORITHMS] = {
-  {SHA1, "SHA1"},
-  {SHA256, "SHA256"},
-  {SHA512, "SHA512"}
+  {SHA1, "sha1"},
+  {SHA256, "sha256"},
+  {SHA512, "sha512"}
 };
 
 int main(int argc, char* argv[]) {
   int i;
   double speed;
   uint32_t msecs;
   uint8_t* buffer = (uint8_t*) Malloc(TEST_BUFFER_SIZE);
   uint8_t* digest = (uint8_t*) Malloc(SHA512_DIGEST_SIZE); /* Maximum size of
                                                             * the digest. */
   ClockTimerState ct;
 
   /* 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",
             hash_functions[i].description, msecs, speed);
-    fprintf(stdout, "%s:%f\n",
+    fprintf(stdout, "mbytes_per_sec_%s:%f\n",
             hash_functions[i].description, speed);
   }
 
   Free(digest);
   Free(buffer);
   return 0;
 }