Add test for a deleted default constructor

test/Jamfile.v2

@@ -73,5 +73,6 @@ import testing ;
     [ run-fail optional_xconfig_NO_PROPER_CONVERT_FROM_CONST_INT_fail.cpp ]
     [ run optional_xconfig_NO_LEGAL_CONVERT_FROM_REF_pass.cpp ]
     [ compile-fail optional_xconfig_NO_LEGAL_CONVERT_FROM_REF_fail.cpp ]
+    [ compile optional_test_deleted_default_ctor.cpp ]
   ;
 }