- Added SHIM_SET_RETURN_32 macro, which sign-extends to 64-bit.
- Updated all uses of SHIM_SET_RETURN to the appropriate macro (either SHIM_SET_RETURN_32 or SHIM_SET_RETURN_64).
This should make it easier to find files and (in the future) split things
up into separate libraries.
It also changes around emulator initialization to make it a little more
difficult to do things out of order and a little more sensible as to when
real init work happens.
Also adding a skeleton audio system/driver and reworking CPU register
access to be more extensible.
Access via xe::kernel::modules::xboxkrnl::ordinals::MyFunction
(or just ordinals::MyFunction when in the namespace).
Some collisions occurred - just added random suffixes for now.
