build: align minimum build dependencies with ndn-cxx

 * Recommend boost >= 1.65.1 and gcc >= 7.4.0
 * Require clang >= 4.0, or Xcode >= 9.0 on macOS
 * Silence an ABI-related diagnostic message from gcc on armv7

Refs: #5087, #5106
Change-Id: I88ef0e0f183736f19ac414a84baebb0e1073381b
diff --git a/tests/main.cpp b/tests/main.cpp
index c111daf..1a6b9b0 100644
--- a/tests/main.cpp
+++ b/tests/main.cpp
@@ -1,6 +1,6 @@
 /* -*- Mode:C++; c-file-style:"gnu"; indent-tabs-mode:nil; -*- */
 /*
- * Copyright (c) 2014-2019,  Regents of the University of California,
+ * Copyright (c) 2014-2020,  Regents of the University of California,
  *                           Arizona Board of Regents,
  *                           Colorado State University,
  *                           University Pierre & Marie Curie, Sorbonne University,
@@ -23,6 +23,5 @@
  * ndn-tools, e.g., in COPYING.md file.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#define BOOST_TEST_MODULE ndn-tools Unit Tests
-
-#include "boost-test.hpp"
+#define BOOST_TEST_MODULE ndn-tools
+#include "tests/boost-test.hpp"