build: update waf to version 2.0.6

Fix discovered build issues

Change-Id: I9a861c955283c1b20cc5065a4baa22bd7c2ab0c1
diff --git a/src/tlv/lsdb-status.hpp b/src/tlv/lsdb-status.hpp
index b144ae2..7d93859 100644
--- a/src/tlv/lsdb-status.hpp
+++ b/src/tlv/lsdb-status.hpp
@@ -1,5 +1,5 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
-/**
+/*
  * Copyright (c) 2014-2018,  The University of Memphis,
  *                           Regents of the University of California,
  *                           Arizona Board of Regents.
@@ -17,7 +17,7 @@
  *
  * You should have received a copy of the GNU General Public License along with
  * NLSR, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
- **/
+ */
 
 #ifndef NLSR_TLV_LSDB_STATUS_HPP
 #define NLSR_TLV_LSDB_STATUS_HPP
@@ -165,6 +165,8 @@
   mutable ndn::Block m_wire;
 };
 
+NDN_CXX_DECLARE_WIRE_ENCODE_INSTANTIATIONS(LsdbStatus);
+
 std::ostream&
 operator<<(std::ostream& os, const LsdbStatus& lsdbStatus);