use more idiomatic request stringfication for componentNormalizer

Author: yyx990803

lib/loader.js

@@ -248,7 +248,9 @@ module.exports = function (content) {
   //   scopeId,
   //   cssModules
   // )
-  output += 'var Component = require(' + JSON.stringify(componentNormalizerPath) + ')(\n'
+  output += 'var Component = require(' +
+    loaderUtils.stringifyRequest(loaderContext, '!' + componentNormalizerPath) +
+  ')(\n'
 
   // <script>
   output += '  /* script */\n  '