trivial: fwupdplugin: install deprecated header as well
trivial: fwupdplugin: install deprecated header as well

fwupd/fwupd,hughsie/fwupd,hughsie/fwupd,hughsie/fwupd,fwupd/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd