semaphore.sh: add to release-3.1 branch

.semaphore.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/env bash
+
+TEST_SUFFIX=$(date +%s | base64 | head -c 15)
+
+TEST_OPTS="RELEASE_TEST=y INTEGRATION=y PASSES='build unit release integration_e2e functional'"
+if [ "$TEST_ARCH" == "386" ]; then
+	TEST_OPTS="GOARCH=386 PASSES='build unit integration_e2e'"
+fi
+
+docker run \
+	--rm \
+	--volume=`pwd`:/go/src/github.com/coreos/etcd \
+	gcr.io/etcd-development/etcd-test:go1.8.5 \
+	/bin/bash -c "${TEST_OPTS} ./test 2>&1 | tee test-${TEST_SUFFIX}.log"
+
+! grep FAIL -A10 -B50 test-${TEST_SUFFIX}.log

.travis.yml

@@ -4,7 +4,7 @@ go_import_path: github.com/coreos/etcd
 sudo: false
 
 go:
-  - 1.8.3
+  - 1.8.5
 
 notifications:
   on_success: never