Makefile: Add verify-build target

...which should "fail successfully" since the `gh2gcs` tool has
been moved into `kpromo`.

Signed-off-by: Stephen Augustus <foo@auggie.dev>

Makefile

@@ -139,13 +139,16 @@ update-mocks: ## Update all generated mocks
 
 ##@ Verify
 
-.PHONY: verify verify-boilerplate verify-dependencies verify-golangci-lint verify-go-mod
+.PHONY: verify verify-boilerplate verify-build verify-dependencies verify-golangci-lint verify-go-mod
 
-verify: verify-boilerplate verify-dependencies verify-golangci-lint verify-go-mod verify-mocks ## Runs verification scripts to ensure correct execution
+verify: verify-boilerplate verify-dependencies verify-golangci-lint verify-go-mod verify-mocks verify-build ## Runs verification scripts to ensure correct execution
 
 verify-boilerplate: ## Runs the file header check
 	./hack/verify-boilerplate.sh
 
+verify-build: ## Ensures repo CLI tools can be built
+	./hack/verify-build.sh
+
 verify-dependencies: ## Runs zeitgeist to verify dependency versions
 	./hack/verify-dependencies.sh
 

hack/verify-build.sh

@@ -0,0 +1,21 @@
+#!/usr/bin/env bash
+
+# Copyright 2021 The Kubernetes Authors.
+#
+# 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.
+
+set -o errexit
+set -o nounset
+set -o pipefail
+
+make build