uefi: Fix a build regression with Fedora 30
uefi: Fix a build regression with Fedora 30

Fixes https://github.com/fwupd/fwupd/issues/1754

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