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Tests fail because the toolchains used for running CI haven't been updated in a while due to build failures. Once the build failures are fixed and toolchains are updated, CI should pass.

Test pass now that the toolchains used for running CI have been updated.

This PR depends on Swift compiler changes after the Swift for TensorFlow 0.11 release, so let's wait until the next release to merge this PR so that tensorflow/swift-apis continues to build with the latest release.

Verifying that tests pass one more time.