build: Fix compilation with boost 1.59

Change-Id: Ib2f72a770effa4a35ad6d21585ddc1043a89ac02
Refs: #3227
diff --git a/tests/global-configuration.cpp b/tests/global-configuration.cpp
index 2b4ce9d..24d4499 100644
--- a/tests/global-configuration.cpp
+++ b/tests/global-configuration.cpp
@@ -48,6 +48,9 @@
 };
 
 BOOST_GLOBAL_FIXTURE(GlobalConfigurationFixture)
+#if BOOST_VERSION >= 105900
+;
+#endif // BOOST_VERSION >= 105900
 
 } // namespace tests
 } // namespace nfd