vboot_reference: remove trailing newline/space for make_dev_ssd

scripts/image_signing/make_dev_ssd.sh

 #!/bin/sh
 #
 # Copyright (c) 2011 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.
 #
 # This script can change key (usually developer keys) and kernel config
 # of a kernels on SSD.
 
 SCRIPT_BASE="$(dirname "$0")"
@@ skipping 141 matching lines @@
     elif ! is_rootfs_verification_enabled "$kernel_config"; then
       echo "INFO: $name: rootfs verification was not enabled."
     else
       debug_msg "Changing boot parameter to remove rootfs verification"
       kernel_config="$(remove_rootfs_verification "$kernel_config")"
       debug_msg "New kernel config: $kernel_config"
       echo "$name: Disabled rootfs verification."
     fi
 
     local new_kernel_config_file="$(make_temp_file)"
-    echo "$kernel_config"  >"$new_kernel_config_file"
+    echo -n "$kernel_config"  >"$new_kernel_config_file"
 
     debug_msg "Re-signing $name from $old_blob to $new_blob"
     debug_msg "Using key: $KERNEL_DATAKEY"
     vbutil_kernel \
       --repack "$new_blob" \
       --keyblock "$KERNEL_KEYBLOCK" \
       --config "$new_kernel_config_file" \
       --signprivate "$KERNEL_DATAKEY" \
       --oldblob "$old_blob" >"$EXEC_LOG" 2>&1 ||
       err_die "Failed to resign $name. Message: $(cat "$EXEC_LOG")"
@@ skipping 100 matching lines @@
   if [ $num_signed -gt 0 -a $num_signed -le $num_given ]; then
     # signed something at least
     echo "Successfully re-signed $num_signed of $num_given kernel(s)" \
       " on device $FLAGS_image".
   else
     err_die "Failed re-signing kernels."
   fi
 }
 
 main