Add stub latch_test.cpp

test/Jamfile

@@ -21,3 +21,5 @@ project
   ;
 
 run quick.cpp ;
+
+run latch_test.cpp ;

test/latch_test.cpp

@@ -0,0 +1,11 @@
+// Copyright 2023 Peter Dimov.
+// Distributed under the Boost Software License, Version 1.0.
+// https://www.boost.org/LICENSE_1_0.txt
+
+#include <boost/compat/latch.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+int main()
+{
+    return boost::report_errors();
+}