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/examples/ndn-load-balancer/random-load-balancer-strategy.hpp b/examples/ndn-load-balancer/random-load-balancer-strategy.hpp
index 997bb56..ef11ae8 100644
--- a/examples/ndn-load-balancer/random-load-balancer-strategy.hpp
+++ b/examples/ndn-load-balancer/random-load-balancer-strategy.hpp
@@ -36,7 +36,7 @@
 
 class RandomLoadBalancerStrategy : public Strategy {
 public:
-  RandomLoadBalancerStrategy(Forwarder& forwarder, const Name& name = STRATEGY_NAME);
+  RandomLoadBalancerStrategy(Forwarder& forwarder, const Name& name = getStrategyName());
 
   virtual ~RandomLoadBalancerStrategy() override;
 
@@ -44,8 +44,8 @@
   afterReceiveInterest(const Face& inFace, const Interest& interest,
                        const shared_ptr<pit::Entry>& pitEntry) override;
 
-public:
-  static const Name STRATEGY_NAME;
+  static const Name&
+  getStrategyName();
 
 protected:
   boost::random::mt19937 m_randomGenerator;