Upgrade the underlying NFD and ndn-cxx to version 0.6.0

Compilation is currently broken and is fixed in the following commit

Change-Id: Ic0dba06a9afd66a810172d4a512f35f6df6b25a2
Refs: #4306
diff --git a/model/ndn-common.hpp b/model/ndn-common.hpp
index 7397de3..a678f5d 100644
--- a/model/ndn-common.hpp
+++ b/model/ndn-common.hpp
@@ -70,7 +70,7 @@
 using ::ndn::KeyChain;
 
 using ::nfd::Face;
-using ::ndn::util::FaceUri;
+using ::ndn::FaceUri;
 
 #ifndef DOXYGEN
 // For python bindings