core: reimplement logging using ndn-cxx's facility

Change-Id: Ifc7c5d70a61ad405dc1f1adfa522a2c0ad1586ab
Refs: #4580
diff --git a/daemon/face/face-system.cpp b/daemon/face/face-system.cpp
index ebdce9c..1d2db37 100644
--- a/daemon/face/face-system.cpp
+++ b/daemon/face/face-system.cpp
@@ -31,7 +31,7 @@
 namespace nfd {
 namespace face {
 
-NFD_LOG_INIT("FaceSystem");
+NFD_LOG_INIT(FaceSystem);
 
 FaceSystem::FaceSystem(FaceTable& faceTable, shared_ptr<ndn::net::NetworkMonitor> netmon)
   : m_faceTable(faceTable)