all: Update code to compile with latest time-related changes in ndn-cpp-dev library

Change-Id: I7e859989c833001f49b286d4a9917f4dc740b4a4
diff --git a/daemon/common.hpp b/daemon/common.hpp
index 3a39f99..32ad4a4 100644
--- a/daemon/common.hpp
+++ b/daemon/common.hpp
@@ -67,6 +67,8 @@
 using namespace ndn::Tlv;
 }
 
+namespace time = ndn::time;
+
 } // namespace nfd
 
 #endif // NFD_COMMON_HPP