Fix boot-time incompatibility

Previously, QEMU would require a special, Andromeda-specific source patch to boot Andromeda correctly. This was due to XNU expecting a different APIC version than what QEMU provides. However, I did some Googling, and it turns out that APIC versions 0x11 and 0x14 are functionally identical. Therefore, I modified XNU so that its APIC version requirement is less stringent.