propsys: Add a stub implementation of propsys.dll.
diff --git a/configure.ac b/configure.ac
index 6aed60b..f0fd49c 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1851,6 +1851,7 @@
 AC_CONFIG_FILES([dlls/pdh/tests/Makefile])
 AC_CONFIG_FILES([dlls/powrprof/Makefile])
 AC_CONFIG_FILES([dlls/printui/Makefile])
+AC_CONFIG_FILES([dlls/propsys/Makefile])
 AC_CONFIG_FILES([dlls/psapi/Makefile])
 AC_CONFIG_FILES([dlls/psapi/tests/Makefile])
 AC_CONFIG_FILES([dlls/pstorec/Makefile])