#4 Copy kernel signatures from Cxbx-Reloaded

[Patrick]

Almost all kernel signatures have been added to the OpenXDK copy in Cxbx-Reloaded, here : https://github.com/Cxbx-Reloaded/Cxbx-Reloaded/tree/master/import/OpenXDK/include/xboxkrnl

I don't have the time to contribute to either OpenXDK nor NXDK, but you people shouldn't let a resource like this go to waste! ;)