core: move nfd-specific files to daemon/

Refs: #4922
Change-Id: I2243dbb87c63f9cbaf7d7051d7a0d4bca2f9fdb5
diff --git a/daemon/face/unicast-udp-transport.cpp b/daemon/face/unicast-udp-transport.cpp
index c2c0d2b..a81e1d0 100644
--- a/daemon/face/unicast-udp-transport.cpp
+++ b/daemon/face/unicast-udp-transport.cpp
@@ -25,7 +25,7 @@
 
 #include "unicast-udp-transport.hpp"
 #include "udp-protocol.hpp"
-#include "daemon/global.hpp"
+#include "common/global.hpp"
 
 #ifdef __linux__
 #include <cerrno>       // for errno