fix build:fetch selected binaries (#3447)

Author: jupdec

Makefile

@@ -292,19 +292,21 @@ docker-metrics-test:     ## Run metrics helper unit test suite in a container.
 plugins: FETCH_VERSION=1.7.1
 plugins: FETCH_URL=https://github.com/containernetworking/plugins/archive/refs/tags/v$(FETCH_VERSION).tar.gz
 plugins: VISIT_URL=https://github.com/containernetworking/plugins/tree/v$(FETCH_VERSION)/plugins/
-plugins: CORE_PLUGINS=bandwidth,host-local,loopback,portmap,sbr
+plugins: CORE_PLUGINS = bandwidth host-local loopback portmap sbr
 plugins:   ## Fetch the CNI plugins
 	@echo "Fetching Container networking plugins v$(FETCH_VERSION) from upstream release"
 	@echo
 	@echo "Visit upstream project for plugin details:"
 	@echo "$(VISIT_URL)"
 	@echo
-	mkdir -p ${CORE_PLUGIN_DIR} ${CORE_PLUGIN_TMP}
-	curl -s -L $(FETCH_URL) | tar xzf - -C ${CORE_PLUGIN_TMP}
-	cd ${CORE_PLUGIN_TMP}/plugins-${FETCH_VERSION} && ./build_linux.sh
-	cp -a ${CORE_PLUGIN_TMP}/plugins-${FETCH_VERSION}/LICENSE ${CORE_PLUGIN_DIR}
-	cp -a ${CORE_PLUGIN_TMP}/plugins-${FETCH_VERSION}/bin/{$(CORE_PLUGINS)} ${CORE_PLUGIN_DIR}
-	rm -rf ${CORE_PLUGIN_TMP}
+	mkdir -p $(CORE_PLUGIN_DIR) $(CORE_PLUGIN_TMP)
+	curl -s -L $(FETCH_URL) | tar xzf - -C $(CORE_PLUGIN_TMP)
+	cd $(CORE_PLUGIN_TMP)/plugins-$(FETCH_VERSION) && ./build_linux.sh
+	cp -a $(CORE_PLUGIN_TMP)/plugins-$(FETCH_VERSION)/LICENSE $(CORE_PLUGIN_DIR)
+	for PLUGIN in $(CORE_PLUGINS); do \
+			cp -a $(CORE_PLUGIN_TMP)/plugins-$(FETCH_VERSION)/bin/$$PLUGIN $(CORE_PLUGIN_DIR); \
+	done
+	rm -rf $(CORE_PLUGIN_TMP)
 
 ##@ Debug script