core: use C++11 <random> instead of Boost.Random

Change-Id: I8f22965b86c681581762a47995f29f888421a558
Refs: #3599
diff --git a/daemon/fw/forwarder.cpp b/daemon/fw/forwarder.cpp
index 9ef3c75..b8bd076 100644
--- a/daemon/fw/forwarder.cpp
+++ b/daemon/fw/forwarder.cpp
@@ -30,7 +30,6 @@
 #include "strategy.hpp"
 #include "table/cleanup.hpp"
 #include <ndn-cxx/lp/tags.hpp>
-#include <boost/random/uniform_int_distribution.hpp>
 
 namespace nfd {
 
@@ -270,7 +269,7 @@
 
   if (wantNewNonce) {
     interest = make_shared<Interest>(*interest);
-    static boost::random::uniform_int_distribution<uint32_t> dist;
+    static std::uniform_int_distribution<uint32_t> dist;
     interest->setNonce(dist(getGlobalRng()));
   }