新增调试信息

libcore/node_modules/@babel/parser/bin/babel-parser.js

@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+/* eslint no-var: 0 */
+
+var parser = require("..");
+var fs = require("fs");
+
+var filename = process.argv[2];
+if (!filename) {
+  console.error("no filename specified");
+} else {
+  var file = fs.readFileSync(filename, "utf8");
+  var ast = parser.parse(file);
+
+  console.log(JSON.stringify(ast, null, "  "));
+}