Release 2020-05-26 toolchain for macOS. (tensorflow#470)

swiftlang/swift@112f6d3

Installation.md

@@ -95,7 +95,7 @@ To install Swift for TensorFlow, download one of the packages below and follow t
 
 | Download |
 |----------|
-| [Xcode 11 (May 13, 2020)](https://storage.googleapis.com/swift-tensorflow/mac/swift-tensorflow-DEVELOPMENT-2020-05-13-a-osx.pkg) |
+| [Xcode 11 (May 26, 2020)](https://storage.googleapis.com/swift-tensorflow/mac/swift-tensorflow-DEVELOPMENT-2020-05-26-a-osx.pkg) |
 | [Ubuntu 18.04 (CPU, TPU) (Nightly)](https://storage.googleapis.com/swift-tensorflow-artifacts/nightlies/latest/swift-tensorflow-DEVELOPMENT-ubuntu18.04.tar.gz) |
 | [Ubuntu 18.04 (CPU, CUDA 10.2, TPU) (Nightly)](https://storage.googleapis.com/swift-tensorflow-artifacts/nightlies/latest/swift-tensorflow-DEVELOPMENT-cuda10.2-cudnn7-ubuntu18.04.tar.gz) |
 | [Ubuntu 18.04 (CPU, CUDA 10.1, TPU) (Nightly)](https://storage.googleapis.com/swift-tensorflow-artifacts/nightlies/latest/swift-tensorflow-DEVELOPMENT-cuda10.1-cudnn7-ubuntu18.04.tar.gz) |
@@ -110,6 +110,7 @@ To install Swift for TensorFlow, download one of the packages below and follow t
 
 | Download |
 |----------|
+| [May 13, 2020](https://storage.googleapis.com/swift-tensorflow/mac/swift-tensorflow-DEVELOPMENT-2020-05-13-a-osx.pkg) |
 | [May 9, 2020](https://storage.googleapis.com/swift-tensorflow/mac/swift-tensorflow-DEVELOPMENT-2020-05-09-a-osx.pkg) |
 | [May 8, 2020](https://storage.googleapis.com/swift-tensorflow/mac/swift-tensorflow-DEVELOPMENT-2020-05-08-a-osx.pkg) |
 | [May 7, 2020](https://storage.googleapis.com/swift-tensorflow/mac/swift-tensorflow-DEVELOPMENT-2020-05-07-a-osx.pkg) |