Fix name. Use existing directory check.

tests/gen_test_vbpubks.sh

 #!/bin/bash
 
 # 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.
 #
 # Generate test vboot public keys and keyblocks for testing.
 
 # Load common constants and variables.
 . "$(dirname "$0")/common.sh"
 
 function generate_vpubks {
   algorithmcounter=0
   for keylen in ${key_lengths[@]}
   do
     for hashalgo in ${hash_algos[@]}
     do
       ${UTIL_DIR}/vbutil_key --pack \
         --in ${TESTKEY_DIR}/key_rsa${keylen}.keyb \
         --out ${TESTKEY_DIR}/key_rsa${keylen}.${hashalgo}.vbpubk \
         --version 1 \
         --algorithm ${algorithmcounter}
       let algorithmcounter=algorithmcounter+1
     done
   done
 }
 
-
-if [ ! -d ${TESTKEY_DIR} ]; then
-  echo "Test Key Directory does not exist!"
-  echo "You must run gen_test_keys.sh first."
-  exit 1
-fi
-
+check_test_keys
 generate_vpubks