xla

cc312e27 - Lower LogSigmoid, LogSigmoidBackward, Elu, and EluBackward (#3539)

Lower LogSigmoid, LogSigmoidBackward, Elu, and EluBackward (#3539) * Lower LogSigmoid * Lower LogSigmoidBackward * Lower Elu and EluBackward * Run linter * Fix typo * Run linter again * Fix rebase issues