common.hpp: prepend NDN_CXX_ to WITH_TESTS macros

refs #2060

Change-Id: I74ea076cacf01d2f7dd9c2e5a42dec1d336f489f
diff --git a/src/util/in-memory-storage-lfu.hpp b/src/util/in-memory-storage-lfu.hpp
index 221c7ca..ac8a02d 100644
--- a/src/util/in-memory-storage-lfu.hpp
+++ b/src/util/in-memory-storage-lfu.hpp
@@ -46,7 +46,7 @@
   virtual
   ~InMemoryStorageLfu();
 
-PUBLIC_WITH_TESTS_ELSE_PROTECTED:
+NDN_CXX_PUBLIC_WITH_TESTS_ELSE_PROTECTED:
   /** @brief Removes one Data packet from in-memory storage based on LFU, i.e. evict the least
    *  frequently accessed Data packet
    *  @return{ whether the Data was removed }