smoke: fix darwin launcher

build/tfs/darwin/build.sh

@@ -41,6 +41,7 @@ function smoketest {
 	SCREENSHOTS="$AGENT_BUILDDIRECTORY/smoketest-screenshots"
 	LOGS="$AGENT_BUILDDIRECTORY/smoketest-logs"
 	rm -rf $SCREENSHOTS $LOGS
+	mkdir -p $SCREENSHOTS $LOGS
 
 	npm run smoketest -- --build "$AGENT_BUILDDIRECTORY/VSCode-darwin/Visual Studio Code - Insiders.app"  --screenshots $SCREENSHOTS --logs $LOGS
 }