Add file missed in last commit.

[SVN r76308]

test/pch_light.hpp

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+//  Copyright John Maddock 2008.
+//  Use, modification and distribution are subject to the
+//  Boost Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifdef BOOST_BUILD_PCH_ENABLED
+
+#define BOOST_MATH_OVERFLOW_ERROR_POLICY ignore_error
+#include <boost/test/test_exec_monitor.hpp>
+#include <boost/test/floating_point_comparison.hpp>
+#include <boost/math/special_functions/math_fwd.hpp>
+#include <boost/math/tools/test.hpp>
+#include <boost/math/tools/stats.hpp>
+#include <boost/type_traits.hpp>
+#include <boost/array.hpp>
+#include "functor.hpp"
+
+#include "handle_test_result.hpp"
+
+#endif