Error message cleanups.

src/hci/commands/image_cmd.c

 		return -EINVAL;
 	}
 	if ( ( rc = imgfetch ( image, filename, image_register ) ) != 0 ) {
-		printf ( "Could not fetch %s: %s\n", name, strerror ( rc ) );
+		printf ( "Could not fetch %s: %s\n",
+			 filename, strerror ( rc ) );
 		image_put ( image );
 		return rc;
 	}

src/usr/autoboot.c

 	}
 	if ( ( rc = imgfetch ( image, filename,
 			       register_and_autoexec_image ) ) != 0 ) {
-		printf ( "Could not retrieve %s: %s\n",
+		printf ( "Could not boot %s: %s\n",
 			 filename, strerror ( rc ) );
 		image_put ( image );
 		return rc;