patch 8.2.4420: menu translations are inconsistent

Problem:    Menu translations are inconsistent.
Solution:   Add a Makefile to convert between encodings. (Ada (Haowen) Yu,
            closes #9801)
diff --git a/runtime/lang/menu_zh_cn.utf-8.vim b/runtime/lang/menu_zh_cn.utf-8.vim
index f7b086d..f9881f5 100644
--- a/runtime/lang/menu_zh_cn.utf-8.vim
+++ b/runtime/lang/menu_zh_cn.utf-8.vim
@@ -1,7 +1,8 @@
 " Menu Translations:    Simplified Chinese
 " Maintainer:           Shun Bai <baishunde@gmail.com>
 " Previous Maintainer:  Yuheng Xie <elephant@linux.net.cn>
-" Last Change:          2020 Apr 23
+" Last Change:          2022 Feb 19
+" Original translations
 
 " Quit when menu translations have already been done.
 if exists("did_menu_trans")
@@ -435,8 +436,8 @@
   menutrans Sorting\ Method					排序方式
   " Netrw.Style.Sorting Method menuitems {{{3
   menutrans Name<tab>s		文件名<tab>s
-  menutrans Time<tab>s  	修改时间<tab>s
-  menutrans Size<tab>s  	大小<tab>s
+  menutrans Time<tab>s		修改时间<tab>s
+  menutrans Size<tab>s		大小<tab>s
   menutrans Exten<tab>s		扩展名<tab>s
   " }}}
   " }}}