Add install test (#8)

* Add first install test

* Fix style

* Split the test into spanner and bigtable

* Correct indentation

* Add other distros, shared lib test, and kokoro configs

* Fix style

ci/test-install/spanner/main.cc

@@ -0,0 +1,22 @@
+// Copyright 2019 Google LLC
+//
+// 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.
+
+#include <google/spanner/v1/spanner.grpc.pb.h>
+#include <grpcpp/grpcpp.h>
+
+int main() {
+  auto creds = grpc::InsecureChannelCredentials();
+  auto channel = grpc::CreateChannel("localhost:12345", creds);
+  auto stub = google::spanner::v1::Spanner::NewStub(channel);
+}