Include cmd/options in Makefile's test

1. Why is this change necessary ?
 Solves kubernetes/node-problem-detector#163

2. How does this change address the issue ?
 Unit testing for node-problem-detector/cmd/options is yet to be
done and the corresponding package path needs to be included in makefile
test

3. How to verify this change ?
 make test command should run the test TestSetNodeNameOrDie with admin
privileges.

Signed-off-by: gkGaneshR <gkganesh126@gmail.com>

Makefile

@@ -87,7 +87,7 @@ Dockerfile: Dockerfile.in
 	sed -e 's|@BASEIMAGE@|$(BASEIMAGE)|g' $< >$@
 
 test: vet fmt
-	go test -timeout=1m -v -race ./pkg/... $(BUILD_TAGS)
+	go test -timeout=1m -v -race ./cmd/options ./pkg/... $(BUILD_TAGS)
 
 build-container: ./bin/node-problem-detector Dockerfile
 	docker build -t $(IMAGE) .