core: move nfd-specific files to daemon/

Refs: #4922
Change-Id: I2243dbb87c63f9cbaf7d7051d7a0d4bca2f9fdb5
diff --git a/daemon/face/face-system.cpp b/daemon/face/face-system.cpp
index 260eea7..67738aa 100644
--- a/daemon/face/face-system.cpp
+++ b/daemon/face/face-system.cpp
@@ -26,7 +26,7 @@
 #include "face-system.hpp"
 #include "protocol-factory.hpp"
 #include "netdev-bound.hpp"
-#include "daemon/global.hpp"
+#include "common/global.hpp"
 #include "fw/face-table.hpp"
 
 namespace nfd {