upstream: ssh/xmss: fix build; ok djm@

OpenBSD-Commit-ID: c9374ca41d4497f1c673ab681cc33f6e7c5dd186

xmss_fast.c

@@ -1,4 +1,4 @@
-/* $OpenBSD: xmss_fast.c,v 1.2 2018/02/26 03:56:44 dtucker Exp $ */
+/* $OpenBSD: xmss_fast.c,v 1.3 2018/03/22 07:06:11 markus Exp $ */
 /*
 xmss_fast.c version 20160722
 Andreas Hülsing
@@ -9,13 +9,13 @@ Public domain.
 #include "includes.h"
 #ifdef WITH_XMSS
 
-#include "xmss_fast.h"
 #include <stdlib.h>
 #include <string.h>
 #ifdef HAVE_STDINT_H
 #include <stdint.h>
 #endif
 
+#include "xmss_fast.h"
 #include "crypto_api.h"
 #include "xmss_wots.h"
 #include "xmss_hash.h"