More runtime file fixes for 'compatible' mode.

runtime/lang/menu_ja_jp.utf-8.vim

@@ -9,6 +9,8 @@ if exists("did_menu_trans")
   finish
 endif
 let did_menu_trans = 1
+let s:keepcpo= &cpo
+set cpo&vim
 
 scriptencoding utf-8
 
@@ -334,7 +336,8 @@ if has('iconv')
   an 10.396.120.130 &File.エンコード指定(&E)\.\.\..保存(&S)\.\.\..UTF-8(&8)<Tab>fenc=utf-8 :set fenc=utf-8 \| w<CR>
 endif
 
+let &cpo = s:keepcpo
+unlet s:keepcpo
+
 " filler to avoid the line above being recognized as a modeline
 " filler
-" filler
-" filler