rename log macros to comply with ISO C++ standard

refs: #4341

Change-Id: Idb05f59660f42c01a7bf014c6fff4125a28327f2
diff --git a/src/adjacent.cpp b/src/adjacent.cpp
index 7109f21..913bbbd 100644
--- a/src/adjacent.cpp
+++ b/src/adjacent.cpp
@@ -91,7 +91,7 @@
 void
 Adjacent::writeLog()
 {
-  _LOG_DEBUG(*this);
+  NLSR_LOG_DEBUG(*this);
 }
 
 } // namespace nlsr