cros-ec: Convert cros-ec-firmware's sections to GPtrArray
cros-ec: Convert cros-ec-firmware's sections to GPtrArray

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