core: move nfd-specific files to daemon/

Refs: #4922
Change-Id: I2243dbb87c63f9cbaf7d7051d7a0d4bca2f9fdb5
diff --git a/daemon/nfd.hpp b/daemon/nfd.hpp
index ba8efd4..f0a09f4 100644
--- a/daemon/nfd.hpp
+++ b/daemon/nfd.hpp
@@ -26,7 +26,7 @@
 #ifndef NFD_DAEMON_NFD_HPP
 #define NFD_DAEMON_NFD_HPP
 
-#include "core/config-file.hpp"
+#include "common/config-file.hpp"
 
 #include <ndn-cxx/net/network-monitor.hpp>
 #include <ndn-cxx/security/key-chain.hpp>