Missing spurious interrupt handlers

[Qubasa]

Hello,

in the blog post hardware-interrupts there has been forgotten to set the
spurious interrupt handlers. Spurious interrupts don't seem to happen in a virtual machine but if you deploy it to hardware you get
them (at least I did). See osdev.org.

Also I am implementing apic support if you want to peek into it for an upcomig blogpost: https://github.com/Luis-Hebendanz/svm_kernel/blob/master/svm_kernel/src/apic.rs