make: quote ldflags

Signed-off-by: Huamin Chen <[email protected]>

Makefile

@@ -448,7 +448,7 @@ VALIDATION_DOCKERFILE := $(SRC_ROOT)/build/Dockerfile.kepler-validator
 build-validator: tidy-vendor format ## Build Validator.
 	@echo TAGS=$(GO_BUILD_TAGS)
 	@mkdir -p "$(CROSS_BUILD_BINDIR)/$(GOOS)_$(GOARCH)"
-	+@$(GOENV) go build -v -tags ${GO_BUILD_TAGS} -o $(CROSS_BUILD_BINDIR)/$(GOOS)_$(GOARCH)/validator -ldflags $(LDFLAGS) ./cmd/validator/validator.go
+	+@$(GOENV) go build -v -tags ${GO_BUILD_TAGS} -o $(CROSS_BUILD_BINDIR)/$(GOOS)_$(GOARCH)/validator -ldflags "$(LDFLAGS)" ./cmd/validator/validator.go
 	cp $(CROSS_BUILD_BINDIR)/$(GOOS)_$(GOARCH)/validator $(CROSS_BUILD_BINDIR)
 .PHONY: build-validator