Add verr & verw instructions

[Alpha-Lin]

Hi, I tested on some script to increase latency, seems working well.

[dderjoel]

Thanks for that @Alpha-Lin.
Could you add some tests, too, please? And perhaps a line in the Changelog. Would you need a new release for this, or is building from the master branch fine for you?

[Alpha-Lin]

Could you add some tests, too, please?

Tests added and indeed things don't work as expected. I can't get verr and verw to work with registers as parameters and when I start opcode with REX to support r8-15 nothing works at all.

Would you need a new release for this, or is building from the master branch fine for you?

I don't need new release, it's only for local experiments.