XLA header+object files and include them in your C++ programs.
    *   Enable `Igamma`, `Igammac` for XLA.
*   Deterministic Op Functionality:
    *   XLA reduction emitter is deterministic when the environment variable
        `TF_DETERMINISTIC_OPS` is set to "true" or "1". This extends
        deterministic `tf.nn.bias_add` back-prop functionality (and therefore