tools: Extend nfdc to allow creation of permanent faces

Change-Id: If108fc3c7ae2ba1adab50269db3a23b426553b56
Refs: #2993
diff --git a/tools/nfdc.hpp b/tools/nfdc.hpp
index f8895b5..daf2f41 100644
--- a/tools/nfdc.hpp
+++ b/tools/nfdc.hpp
@@ -244,6 +244,7 @@
   uint64_t m_origin;
   ndn::time::milliseconds m_expires;
   std::string m_name;
+  FacePersistency m_facePersistency;
 
 private:
   ndn::KeyChain m_keyChain;