adopt externally-set GO_BUILD_FLAGS (#1881)

Signed-off-by: Jordan Keister <[email protected]>

Author: grokspawn

Diff for: Makefile

@@ -226,8 +226,8 @@ E2E_REGISTRY_IMAGE=localhost/e2e-test-registry:devel
 image-registry: export GOOS=linux
 image-registry: export GOARCH=amd64
 image-registry: ## Build the testdata catalog used for e2e tests and push it to the image registry
-	go build $(GO_BUILD_FLAGS) -tags '$(GO_BUILD_TAGS)' -ldflags '$(GO_BUILD_LDFLAGS)' -gcflags '$(GO_BUILD_GCFLAGS)' -asmflags '$(GO_BUILD_ASMFLAGS)' -o ./testdata/registry/bin/registry ./testdata/registry/registry.go
-	go build $(GO_BUILD_FLAGS) -tags '$(GO_BUILD_TAGS)' -ldflags '$(GO_BUILD_LDFLAGS)' -gcflags '$(GO_BUILD_GCFLAGS)' -asmflags '$(GO_BUILD_ASMFLAGS)' -o ./testdata/push/bin/push         ./testdata/push/push.go
+	go build $(GO_BUILD_FLAGS) $(GO_BUILD_EXTRA_FLAGS) -tags '$(GO_BUILD_TAGS)' -ldflags '$(GO_BUILD_LDFLAGS)' -gcflags '$(GO_BUILD_GCFLAGS)' -asmflags '$(GO_BUILD_ASMFLAGS)' -o ./testdata/registry/bin/registry ./testdata/registry/registry.go
+	go build $(GO_BUILD_FLAGS) $(GO_BUILD_EXTRA_FLAGS) -tags '$(GO_BUILD_TAGS)' -ldflags '$(GO_BUILD_LDFLAGS)' -gcflags '$(GO_BUILD_GCFLAGS)' -asmflags '$(GO_BUILD_ASMFLAGS)' -o ./testdata/push/bin/push         ./testdata/push/push.go
 	$(CONTAINER_RUNTIME) build -f ./testdata/Dockerfile -t $(E2E_REGISTRY_IMAGE) ./testdata
 	$(CONTAINER_RUNTIME) save $(E2E_REGISTRY_IMAGE) | $(KIND) load image-archive /dev/stdin --name $(KIND_CLUSTER_NAME)
 	./testdata/build-test-registry.sh $(E2E_REGISTRY_NAMESPACE) $(E2E_REGISTRY_NAME) $(E2E_REGISTRY_IMAGE)
@@ -240,7 +240,7 @@ image-registry: ## Build the testdata catalog used for e2e tests and push it to
 .PHONY: test-e2e
 test-e2e: KIND_CLUSTER_NAME := operator-controller-e2e
 test-e2e: KUSTOMIZE_BUILD_DIR := config/overlays/e2e
-test-e2e: GO_BUILD_FLAGS := -cover
+test-e2e: GO_BUILD_EXTRA_FLAGS := -cover
 test-e2e: run image-registry e2e e2e-coverage kind-clean #HELP Run e2e test suite on local kind cluster
 
 .PHONY: extension-developer-e2e
@@ -317,7 +317,7 @@ export VERSION_PATH := ${GIT_REPO}/internal/shared/version
 export GO_BUILD_TAGS := containers_image_openpgp
 export GO_BUILD_ASMFLAGS := all=-trimpath=$(PWD)
 export GO_BUILD_GCFLAGS := all=-trimpath=$(PWD)
-export GO_BUILD_FLAGS :=
+export GO_BUILD_EXTRA_FLAGS :=
 export GO_BUILD_LDFLAGS := -s -w \
     -X '$(VERSION_PATH).version=$(VERSION)' \
     -X '$(VERSION_PATH).gitCommit=$(GIT_COMMIT)' \
@@ -326,7 +326,7 @@ BINARIES=operator-controller catalogd
 
 .PHONY: $(BINARIES)
 $(BINARIES):
-	go build $(GO_BUILD_FLAGS) -tags '$(GO_BUILD_TAGS)' -ldflags '$(GO_BUILD_LDFLAGS)' -gcflags '$(GO_BUILD_GCFLAGS)' -asmflags '$(GO_BUILD_ASMFLAGS)' -o $(BUILDBIN)/$@ ./cmd/$@
+	go build $(GO_BUILD_FLAGS) $(GO_BUILD_EXTRA_FLAGS) -tags '$(GO_BUILD_TAGS)' -ldflags '$(GO_BUILD_LDFLAGS)' -gcflags '$(GO_BUILD_GCFLAGS)' -asmflags '$(GO_BUILD_ASMFLAGS)' -o $(BUILDBIN)/$@ ./cmd/$@
 
 .PHONY: build-deps
 build-deps: manifests generate fmt