Defines starting with `k' in osfmk/mach/i386

• KERN_CODE_SELECTOR osfmk/mach/i386/thread_status.h:423
• KERN_DATA_SELECTOR osfmk/mach/i386/thread_status.h:424
• KERNEL_STACK_SIZE osfmk/mach/i386/vm_param.h:315