Add syntax files from upstream vim repository

ftdetect/polyglot.vim

@@ -9,6 +9,10 @@ if !exists('g:vim_json_syntax_conceal')
 endif
 
 let g:filetype_euphoria = 'elixir'
+augroup filetypedetect
+" vim:vim/vim::/runtime/
+augroup END
+
 augroup filetypedetect
 " apiblueprint:sheerun/apiblueprint.vim
 autocmd BufReadPost,BufNewFile *.apib set filetype=apiblueprint
@@ -150,10 +154,6 @@ if has("autocmd")
 endif
 augroup END
 
-augroup filetypedetect
-" css:JulesWang/css.vim
-augroup END
-
 augroup filetypedetect
 " cucumber:tpope/vim-cucumber
 " Cucumber