Reduce inclusions of <boost/asio.hpp> in public headers
And especially, stop including it from the precompiled header
"common-pch.hpp". This is a necessary step in order to avoid
conflicts between net/if.h (pulled in by Asio) and linux/if.h
(required by future commits).
Change-Id: I0207be0d2be796d8ef369062a8d5195fedfef6b0
diff --git a/tests/unit-tests/unit-test-time-fixture.hpp b/tests/unit-tests/unit-test-time-fixture.hpp
index 9c349fb..8d7ac17 100644
--- a/tests/unit-tests/unit-test-time-fixture.hpp
+++ b/tests/unit-tests/unit-test-time-fixture.hpp
@@ -1,6 +1,6 @@
/* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
/**
- * Copyright (c) 2013-2015 Regents of the University of California.
+ * Copyright (c) 2013-2016 Regents of the University of California.
*
* This file is part of ndn-cxx library (NDN C++ library with eXperimental eXtensions).
*
@@ -23,7 +23,8 @@
#define NDN_TESTS_UNIT_TESTS_UNIT_TEST_TIME_FIXTURE_HPP
#include "util/time-unit-test-clock.hpp"
-#include <boost/asio.hpp>
+
+#include <boost/asio/io_service.hpp>
namespace ndn {
namespace tests {