build: == Dependency change ==  NFD now depends on ndn-cxx library

Change-Id: Ia9dd324a536573b5ac4fe1b73d82af772dc84923
Refs: #1536
diff --git a/core/face-monitor.hpp b/core/face-monitor.hpp
index 6ce6595..28cfdbd 100644
--- a/core/face-monitor.hpp
+++ b/core/face-monitor.hpp
@@ -28,7 +28,7 @@
 
 #include "common.hpp"
 
-#include <ndn-cpp-dev/management/nfd-face-event-notification.hpp>
+#include <ndn-cxx/management/nfd-face-event-notification.hpp>
 
 namespace ndn {
 class Face;