trivial: Always include the prefix for sysconfdir
trivial: Always include the prefix for sysconfdir

vathpela/fwupd,fwupd/fwupd,vathpela/fwupd,superm1/fwupd,superm1/fwupd,hughsie/fwupd,hughsie/fwupd,vathpela/fwupd,superm1/fwupd,hughsie/fwupd,fwupd/fwupd,fwupd/fwupd,hughsie/fwupd,vathpela/fwupd,fwupd/fwupd