management: Fixing include guards

Change-Id: Ib592f256e25f22fd75430d041fe9be0a890a01f6
diff --git a/src/management/nfd-face-monitor.hpp b/src/management/nfd-face-monitor.hpp
index 07af961..da6e510 100644
--- a/src/management/nfd-face-monitor.hpp
+++ b/src/management/nfd-face-monitor.hpp
@@ -46,7 +46,7 @@
  */
 
 #ifndef NDN_MANAGEMENT_NFD_FACE_MONITOR_HPP
-#define NDN_MANAGEMENT_NFD_MONITOR_HPP
+#define NDN_MANAGEMENT_NFD_FACE_MONITOR_HPP
 
 #include "../util/notification-subscriber.hpp"
 #include "nfd-face-event-notification.hpp"