xla

6639bcc4 - TensorFlow June pin update & PyTorch/XLA c++17 migration (follow up) (#3794)

TensorFlow June pin update & PyTorch/XLA c++17 migration (follow up) (#3794) * adding tf pin * moving tf pin to a week back when tf had a successful pin - jun 22 * pin update, some debug prints - to remove later * moved pytorch/xla to c++17 * adding torch pin for testing * adding torch pin for testing * adding torch pin for testing * adding c++17 to CMakeLists.txt * removed torch pin * removing the environment variable * type * moving back to -Wno-c++11-narrowing * trying both c++11 and c++14 narrowing