Upgrade libtomcrypt

Sources/DataLiteC/libtomcrypt/ciphers/serpent.c

@@ -693,7 +693,7 @@ int serpent_test(void)
    symmetric_key key;
    int err, x;
 
-   for (x = 0; x < (int)(sizeof(tests)/sizeof(tests[0])); x++) {
+   for (x = 0; x < (int)LTC_ARRAY_SIZE(tests); x++) {
       if ((err = serpent_setup(tests[x].key, tests[x].keylen, 0, &key)) != CRYPT_OK) {
         return err;
       }