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

Change-Id: Ia9dd324a536573b5ac4fe1b73d82af772dc84923
Refs: #1536
diff --git a/tests/test-common.hpp b/tests/test-common.hpp
index f4fc0ed..8939324 100644
--- a/tests/test-common.hpp
+++ b/tests/test-common.hpp
@@ -28,7 +28,7 @@
 #include <boost/test/unit_test.hpp>
 #include "core/global-io.hpp"
 #include "core/logger.hpp"
-#include <ndn-cpp-dev/security/key-chain.hpp>
+#include <ndn-cxx/security/key-chain.hpp>
 
 namespace nfd {
 namespace tests {