Add continuous Kokoro config for the GitHub release branch.

PiperOrigin-RevId: 219174684
GitOrigin-RevId: 5bb467f9122872ca67aa3e28205c14166578e33b
(cherry picked from commit 29ef947d)

kokoro/README.md

@@ -3,17 +3,25 @@
 ![Kokoro Ubuntu](https://storage.googleapis.com/tink-kokoro-build-badges/tink-ubuntu.png)
 ![Kokoro macOS](https://storage.googleapis.com/tink-kokoro-build-badges/tink-macos.png)
 
-Tink is testing continuously with
-[Kokoro](https://www.cloudbees.com/sites/default/files/2016-jenkins-world-jenkins_inside_google.pdf)
+Tink is automatically tested using
+[Kokoro](https://www.cloudbees.com/sites/default/files/2016-jenkins-world-jenkins_inside_google.pdf),
 an internal deployment of Jenkins at Google.
 
 Continuous builds and presubmit tests are run on Ubuntu and macOS.
 
-Presubmit tests are triggered for the pull request if one of the following
+## Continuous builds
+
+Continuous builds are triggered for every new commit to the master branch and
+the current release branch.
+
+For the master branch, at the end of a successful
+continious build, a snapshot of Tink and the example apps are created and
+uploaded to Maven.
+
+## Presubmit testing
+
+Presubmit tests are triggered for a pull request if one of the following
 conditions is met:
 
  - The pull request is created by a Googler.
- - The pull request is attached with a kokoro:run label.
-
-Continuous builds are triggered for every new commit, and upload to Maven snapshot
-versions of Tink and apps.
+ - The pull request is attached with a `kokoro:run` label.

kokoro/continuous-release.sh

+#!/bin/bash
+
+# Copyright 2017 Google Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+####################################################################################
+
+# Fail on any error.
+set -e
+
+# Display commands to stderr.
+set -x
+
+# Change to repo root
+cd git*/tink
+
+source ./kokoro/run_tests.sh
+
+# Run all manual tests.
+time bazel test \
+--strategy=TestRunner=standalone \
+--test_timeout 10000 \
+--test_output=all \
+//java:src/test/java/com/google/crypto/tink/subtle/AesGcmJceTest \
+//java:src/test/java/com/google/crypto/tink/subtle/AesGcmHkdfStreamingTest