internal/util: move the case 'latin1'

make the `case 'latin1':` near by `case 'binary':`.

PR-URL: https://github.com/nodejs/node/pull/9646
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Roman Reiss <me@silverwind.io>
Reviewed-By: Michaël Zasso <targos@protonmail.com>

lib/internal/util.js

@@ -147,15 +147,15 @@ exports.normalizeEncoding = function normalizeEncoding(enc) {
       case 'utf-8':
         return 'utf8';
       case 'ucs2':
-      case 'utf16le':
       case 'ucs-2':
+      case 'utf16le':
       case 'utf-16le':
         return 'utf16le';
+      case 'latin1':
       case 'binary':
         return 'latin1';
       case 'base64':
       case 'ascii':
-      case 'latin1':
       case 'hex':
         return enc;
       default: