Respect symlinks for resolving vim-polyglot as fallback, closes #605

after/ftplugin/javascript-1.vim

@@ -1,4 +1,6 @@
-if !exists('g:polyglot_disabled') || index(g:polyglot_disabled, 'javascript') == -1
+if !polyglot#util#IsEnabled('javascript', expand('<sfile>:p'))
+  finish
+endif
 
 " Vim filetype plugin file
 " Language:     JavaScript
@@ -12,5 +14,3 @@ if exists('b:undo_ftplugin')
 else
   let b:undo_ftplugin = 'setlocal iskeyword< suffixesadd<'
 endif
-
-endif