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

Change-Id: Ia9dd324a536573b5ac4fe1b73d82af772dc84923
Refs: #1536
diff --git a/core/scheduler.hpp b/core/scheduler.hpp
index f275c69..c674429 100644
--- a/core/scheduler.hpp
+++ b/core/scheduler.hpp
@@ -26,7 +26,7 @@
 #define NFD_CORE_SCHEDULER_HPP
 
 #include "common.hpp"
-#include <ndn-cpp-dev/util/scheduler.hpp>
+#include <ndn-cxx/util/scheduler.hpp>
 
 namespace nfd {
 namespace scheduler {