fix: Only one ldflags flag is allowed

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

Makefile

@@ -18,15 +18,15 @@ GIT_SHA=$(shell git rev-parse HEAD)
 # with the SDK and printing just the version number that comes after it.
 SDKVERSION=$(shell sed -En 's|.*github.com/edgexfoundry/app-functions-sdk-go/v3 (v[\.0-9a-zA-Z-]+).*|\1|p' go.mod)
 
+ifeq ($(ENABLE_FULL_RELRO), true)
+	ENABLE_FULL_RELRO_GOFLAGS = -bindnow
+endif
+
 GOFLAGS=-ldflags "-s -w -X github.com/edgexfoundry/app-functions-sdk-go/v3/internal.SDKVersion=$(SDKVERSION) \
 					-X github.com/edgexfoundry/app-functions-sdk-go/v3/internal.ApplicationVersion=$(APPVERSION) \
-					-X edgexfoundry/app-rfid-llrp-inventory.Version=$(APPVERSION)" -trimpath -mod=readonly
+					-X edgexfoundry/app-rfid-llrp-inventory.Version=$(APPVERSION) $(ENABLE_FULL_RELRO_GOFLAGS)" -trimpath -mod=readonly
 GOTESTFLAGS?=-race
 
-ifeq ($(ENABLE_FULL_RELRO), "true")
-	GOFLAGS += -ldflags "-bindnow"
-endif
-
 ifeq ($(ENABLE_PIE), "true")
 	GOFLAGS += -buildmode=pie
 endif