Allow the autoupdater to work when updating from the removed targets.
@@ -7,3 +7,5 @@ factory_image x86-generic combined-ext4 .img.gz
factory_image x86-generic combined-ext4 .vdi
factory_image x86-generic combined-ext4 .vmdk
sysupgrade_image x86-generic combined-ext4 .img.gz
+manifest_alias x86-kvm
+manifest_alias x86-xen_domu