Correct small bug in memcpy 32bits implementation

I'm not entirely sure about it, but the rest of the file treats 32 bits as groups of 4 so it makes sense that memcpy does the same.

Reduce kernel heap to 64 MB
Fix issue in build.rs

Add temporary override for spin-rs

Add commented out system call debug printing code

Add syscall name debugging
Update debugging code

Improve error information
Cleanup interrupt macros

Fully implemented AML parser, some amendments to ACPI infrastructure