Comment 55 for bug 1828495

Recent libvirt versions (5.5) added more for arch_capabilities.
Lets get that into Eoan before considering the SRUs back to Bionic afterwards.

commit ver subject
2674d00e 5.5 qemu: Drop MSR features from host-model with old QEMU
8eb4a89f 5.5 qemu: Forbid MSR features with old QEMU
c8ec678f 5.5 cpu_map: Introduce IA32_ARCH_CAPABILITIES MSR features
56b254dc 5.5 cpu_x86: Read CPU features from IA32_ARCH_CAPABILITIES MSR
bcfed7f1 5.5 cpu_x86: Introduce virCPUx86FeatureFilter*MSR
b8e086a5 5.5 cpu_x86: Turn virCPUx86DataIteratorInit into a function
4e6f58b8 5.5 conf: Introduce virCPUDefCheckFeatures

511df17a 5.0 cpu_map: Add support for arch-capabilities feature