fix: add missing #includes

client/cmdlfvisa2000.c

@@ -11,6 +11,7 @@
 #include "cmdlfvisa2000.h"
 
 #include <stdio.h>
+#include <string.h>
 #include "proxmark3.h"
 #include "ui.h"
 #include "util.h"

client/nonce2key/nonce2key.c

@@ -14,6 +14,7 @@
 
 #include <inttypes.h>
 #include <stdio.h>
+#include <stdlib.h>
 #include "mifarehost.h"
 #include "ui.h"
 #include "util.h"