Make use of logger provided by ndn-cxx

This commit also introduces a basic implmentation of DummyForwarder to
remove dependency on (and uncertainty of) the running instance of NFD.

Change-Id: Iba9fcbf3d3ebb1a5ae47018ad3be5d7d2b9c7462
diff --git a/osx/auto-update/sparkle-auto-update.mm b/osx/auto-update/sparkle-auto-update.mm
index 388dce7..d64079b 100644
--- a/osx/auto-update/sparkle-auto-update.mm
+++ b/osx/auto-update/sparkle-auto-update.mm
@@ -25,7 +25,7 @@
 
 #include "logging.hpp"
 
-INIT_LOGGER("SparkeAutoUpdate");
+_LOG_INIT(SparkeAutoUpdate);
 
 class SparkleAutoUpdate::Private
 {