Will Thorne Staff WriterTaika Waititi has set another series at FX.The prolific filmmaker, who already has “What We Do in the Shadows” heading into a third season at the network, is teaming with Native American writer and director Sterlin Harjo for half-hour comedy “Reservation Dogs.”“Reservation Dogs,” which has been handed a series order by FX, follows four Native teenagers in rural Oklahoma who spend their days committing crime and fighting it.The pilot was co-written by Waititi and Harjo