tools+core: Moving Network class implementation to core

Change-Id: I312b827215c8ec3d13aff61584f162125fc48d2a
Refs: #2153
diff --git a/tools/nfd-autoreg.cpp b/tools/nfd-autoreg.cpp
index 0b6f7a5..dc013ea 100644
--- a/tools/nfd-autoreg.cpp
+++ b/tools/nfd-autoreg.cpp
@@ -37,7 +37,7 @@
 
 #include "version.hpp"
 #include "core/face-uri.hpp"
-#include "network.hpp"
+#include "core/network.hpp"
 
 namespace po = boost::program_options;