core: move nfd-specific files to daemon/

Refs: #4922
Change-Id: I2243dbb87c63f9cbaf7d7051d7a0d4bca2f9fdb5
diff --git a/daemon/face/udp-channel.cpp b/daemon/face/udp-channel.cpp
index b9da25e..7f4a4d9 100644
--- a/daemon/face/udp-channel.cpp
+++ b/daemon/face/udp-channel.cpp
@@ -26,7 +26,7 @@
 #include "udp-channel.hpp"
 #include "generic-link-service.hpp"
 #include "unicast-udp-transport.hpp"
-#include "daemon/global.hpp"
+#include "common/global.hpp"
 
 namespace nfd {
 namespace face {