Release 2020-07-16 toolchain for macOS. (#503)
Release 2020-07-16 toolchain for macOS. (#503)

https://github.com/apple/swift/commit/3c6fe132533201fec6ab485f78d45fc807142c3e
https://github.com/tensorflow/swift-apis/commit/bf942f2634862596a01f8fe5a5a049ecd3b6f2a4
tensorflow/swift,tensorflow/swift