src: minor updates to common.hpp and common-pch.hpp

Also remove redundant includes.

Change-Id: I0e1f55abcf852b95a4fd8c9a0e3a30aa153f892c
diff --git a/tests/boost-test.hpp b/tests/boost-test.hpp
index 70e5426..1d21b3f 100644
--- a/tests/boost-test.hpp
+++ b/tests/boost-test.hpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /**
- * Copyright (c) 2013-2014 Regents of the University of California.
+ * Copyright (c) 2013-2017 Regents of the University of California.
  *
  * This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
  *
@@ -27,7 +27,7 @@
 #pragma clang system_header
 
 #include <boost/test/unit_test.hpp>
-#include <boost/concept_check.hpp>
 #include <boost/test/output_test_stream.hpp>
+#include <boost/concept_check.hpp>
 
 #endif // NDN_TESTS_BOOST_TEST_HPP