Add tests that include <windows.h>

test/Jamfile

@@ -272,3 +272,7 @@ run lsp_convertible_test2.cpp ;
 run make_shared_array_tmp_test.cpp ;
 
 run lw_thread_test.cpp : : : <threading>multi ;
+
+compile sp_windows_h_test.cpp ;
+compile spinlock_windows_h_test.cpp ;
+compile yield_k_windows_h_test.cpp ;

test/sp_windows_h_test.cpp

@@ -0,0 +1,11 @@
+// Copyright 2018 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+
+#if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+# include <windows.h>
+# include <boost/shared_ptr.hpp>
+#endif
+
+int main()
+{
+}

test/spinlock_windows_h_test.cpp

@@ -0,0 +1,11 @@
+// Copyright 2018 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+
+#if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+# include <windows.h>
+# include <boost/smart_ptr/detail/spinlock.hpp>
+#endif
+
+int main()
+{
+}

test/yield_k_windows_h_test.cpp

@@ -0,0 +1,11 @@
+// Copyright 2018 Peter Dimov
+// Distributed under the Boost Software License, Version 1.0.
+
+#if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
+# include <windows.h>
+# include <boost/smart_ptr/detail/yield_k.hpp>
+#endif
+
+int main()
+{
+}