Fix problems with echo and newlines

printf is more portable

.makefiles/git.mk

@@ -14,7 +14,7 @@ push-github: ## Push the code to github. You need to set up GITHUB_DEPLOY_KEY
 ifeq ($(GITHUB_DEPLOY_KEY),)
 else
 	$(eval KEY_FILE := "$(shell mktemp)")
-	@echo "$(GITHUB_DEPLOY_KEY)" > $(KEY_FILE)
+	@printf '%b' '$(GITHUB_DEPLOY_KEY)' > $(KEY_FILE)
 	@git remote rm github-deploy || true
 	git remote add github-deploy $(GITHUB_REPO)
 	-@GIT_SSH_COMMAND="ssh -i $(KEY_FILE)" git fetch github-deploy $(CI_COMMIT_REF_NAME)

.makefiles/k8s.mk

@@ -13,7 +13,7 @@
 KUBE_CA_TEMP=false
 ifndef KUBE_CA_PEM_FILE
 KUBE_CA_PEM_FILE:=$$PWD/.ca.crt
-CREATED:=$(shell echo -e "$(KUBE_CA_BUNDLE)" > $(KUBE_CA_PEM_FILE))
+CREATED:=$(shell printf '%b\n' '$(KUBE_CA_BUNDLE)' > $(KUBE_CA_PEM_FILE))
 endif 
 KUBE_TOKEN?=""
 KUBE_NAMESPACE?=$(NAME)