Update Lift to f5d36d3
Update Lift to f5d36d3

backends: Remove ENABLE_*_BACKEND constants
sys/host: Cleanup compute_device_host
sys/cuda: Move compute_device_cuda method implementations into library

NVlabs/firepony,NVlabs/firepony,broadinstitute/firepony,broadinstitute/firepony,NVlabs/firepony,broadinstitute/firepony,NVlabs/firepony,broadinstitute/firepony