fix include of crypto

sys/net/ccn_lite/ccnl-ext.h

@@ -26,7 +26,7 @@
 #ifndef CCNL_EXT_H__
 #define CCNL_EXT_H__
 
-#define compute_ccnx_digest(buf) SHA256(buf->data, buf->datalen, NULL)
+#define compute_ccnx_digest(buf) sha256(buf->data, buf->datalen, NULL)
 
 #ifdef USE_FRAG
 

sys/net/ccn_lite/ccnl-includes.h

@@ -26,7 +26,7 @@
 #include <stdlib.h>
 #include <string.h>
 
-#include "sha256.h"
+#include "crypto/sha256.h"
 
 #define RIOT_MSG_DEV    (1)
 #define RIOT_TRANS_DEV  (2)