Uxn stack opcodes order changed

[neauoire]

This change was added to help with the drop/roll/pick microcode implementation and as to follow the machineforth order:

The only thing that changes is the order of the opcodes, the uxngba port uses a very similar uxn.c file to yours, I'm not sure if it's just a matter of copy/pasting it.

This is possibly the last change to the uxn core, ever.

[asiekierka]

https://github.com/asiekierka/uxnds/commit/6eb64c15c6c3e1ab330a2dd62abcfe3bb660e1e6

[neauoire]

cheers ^^