libxl: make use of e820_host feature
libxl: make use of e820_host feature

Signed-off-by: Marek Marczykowski-Górecki <b37867d4e08020cf5bb17f05a2c036fbc82d5481@invisiblethingslab.com>
Reviewed-by: Jim Fehlig <39929b5b86d72d51fceac59b52303e3fe8a3083e@suse.com>

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