Test cmp and === on signed num zeros
Test cmp and === on signed num zeros

RT#128395: https://rt.perl.org/Ticket/Display.html?id=128395
Fix commit: https://github.com/rakudo/rakudo/commit/085145f3a5

dogbert17/roast,bitrauser/roast,bitrauser/roast,perl6/roast,dogbert17/roast