chore: import upstream snapshot with attribution

tensorflow/tools/lib_package/README.md

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+Bazel rules to package the TensorFlow APIs in languages other than Python into
+archives.
+
+## C library
+
+The TensorFlow [C
+API](https://www.tensorflow.org/code/tensorflow/c/c_api.h)
+is typically a requirement of TensorFlow APIs in other languages such as
+[Go](https://www.tensorflow.org/code/tensorflow/go)
+and [Rust](https://github.com/tensorflow/rust).
+
+The following commands:
+
+```sh
+bazel test --config opt //tensorflow/tools/lib_package:libtensorflow_test
+bazel build --config opt //tensorflow/tools/lib_package:libtensorflow
+```
+
+test and produce the archive at
+`bazel-bin/tensorflow/tools/lib_package/libtensorflow.tar.gz`, which can be
+distributed and installed using something like:
+
+```sh
+tar -C /usr/local -xzf libtensorflow.tar.gz
+```
+
+## Release
+
+Scripts to build these archives for TensorFlow releases are in
+[tensorflow/tools/ci_build/linux](https://www.tensorflow.org/code/tensorflow/tools/ci_build/linux)
+and
+[tensorflow/tools/ci_build/osx](https://www.tensorflow.org/code/tensorflow/tools/ci_build/osx)