Add <warnings>extra to test/Jamfile

test/throw_exception_nx_test.cpp

@@ -2,6 +2,11 @@
 // Distributed under the Boost Software License, Version 1.0.
 // http://www.boost.org/LICENSE_1_0.txt
 
+#if defined(_MSC_VER)
+# pragma warning(disable: 4702) // unreachable code
+# pragma warning(disable: 4577) // noexcept used without /EHsc
+#endif
+
 #include <boost/throw_exception.hpp>
 #include <cstdlib>