SneakySys tests

[C-Sto]

I've been asked by a few people when the sneakysys branch will be merged - so these are the two things that are holding it back at the moment.

1. Parameters are passed correctly. This should be reasonably straight forward, but will be a bit painful to do automagically. Ideally, I'd like to make a Syscall( call with 1,2,3.. up to 8 parameters to ensure that they are all passed as intended. The process I have in mind for this is literally using a debugger to eyeball the parameters, and ensure they land where they are meant to go (just passing the value 1,2,3 etc in will be fine, it doesn't have to execute anything)
2. No weird problems across different OS versions. A bit easier to automagic up - compile a single bin that calls a few common functions, run it on a bunch of operating systems, hope that there aren't any weird crashes. I'd like to ensure it works on Win 7 through 10, with a 'nice to have' including XP and 11.