security: using new security interfaces of ndn-cpp, such as SecPolicy

Change-Id: Id22c8e711bee7c3723076eda7a3f96c72ca7707c
diff --git a/src/chronos-invitation.cpp b/src/chronos-invitation.cpp
index 7912a2d..b49c08b 100644
--- a/src/chronos-invitation.cpp
+++ b/src/chronos-invitation.cpp
@@ -10,7 +10,7 @@
 
 #include "chronos-invitation.h"
 
-#include <ndn-cpp/security/certificate/identity-certificate.hpp>
+#include <ndn-cpp/security/identity-certificate.hpp>
 #include "logging.h"
 
 using namespace std;