新增调试信息

libcore/node_modules/browserify/test/dup/foo-dup.js

@@ -0,0 +1,4 @@
+// something on first line
+module.exports = function () {
+  console.log('I like to duplicate myself');  
+};

libcore/node_modules/browserify/test/dup/foo.js

@@ -0,0 +1,4 @@
+// something on first line
+module.exports = function () {
+  console.log('I like to duplicate myself');  
+};

libcore/node_modules/browserify/test/dup/index.js

@@ -0,0 +1,5 @@
+var foo = require('./foo');
+var foodup = require('./foo-dup');
+
+foo();
+foodup();