Make sure code compiles on Ubuntu 12.04 with boost 1.46
Work with permissions in boost::filesystem was introduced in boost 1.49
diff --git a/ccnx/ccnx-discovery.h b/ccnx/ccnx-discovery.h
index 959167a..b03a937 100644
--- a/ccnx/ccnx-discovery.h
+++ b/ccnx/ccnx-discovery.h
@@ -28,8 +28,7 @@
#include "scheduler.h"
#include <boost/shared_ptr.hpp>
#include <boost/function.hpp>
-#include <boost/random/random_device.hpp>
-#include <boost/random/uniform_int_distribution.hpp>
+#include <boost/random.hpp>
#include <boost/thread/mutex.hpp>
#include <boost/thread/locks.hpp>
#include <list>