cpu_x86: Add x86ModelCopySignatures helper
cpu_x86: Add x86ModelCopySignatures helper

Introduce a helper for copying CPU signature between two CPU models.

It's not very useful until the way we store signatures is changed in the
next patch.

Signed-off-by: Jiri Denemark <62bdf77dc47919a4d59a91822129d14633cfca81@redhat.com>
Reviewed-by: Ján Tomko <4cab11cfb98d3c937327354a78eb07dbb6ee2bc6@redhat.com>

fabianfreyer/libvirt,eskultety/libvirt,jardasgit/libvirt,jfehlig/libvirt,crobinso/libvirt,libvirt/libvirt,fabianfreyer/libvirt,zippy2/libvirt,jardasgit/libvirt,nertpinx/libvirt,jfehlig/libvirt,fabianfreyer/libvirt,fabianfreyer/libvirt,zippy2/libvirt,crobinso/libvirt,zippy2/libvirt,eskultety/libvirt,andreabolognani/libvirt,eskultety/libvirt,jfehlig/libvirt,libvirt/libvirt,zippy2/libvirt,crobinso/libvirt,andreabolognani/libvirt,olafhering/libvirt,nertpinx/libvirt,olafhering/libvirt,andreabolognani/libvirt,libvirt/libvirt,jfehlig/libvirt,nertpinx/libvirt,olafhering/libvirt,crobinso/libvirt,eskultety/libvirt,nertpinx/libvirt,andreabolognani/libvirt,olafhering/libvirt,nertpinx/libvirt,jardasgit/libvirt,andreabolognani/libvirt,fabianfreyer/libvirt,jardasgit/libvirt,jardasgit/libvirt,eskultety/libvirt,libvirt/libvirt