change vagrant-bindfs problems for file ownership
change vagrant-bindfs problems for file ownership

Per http://php.net/manual/en/function.chmod.php#refsect1-function.chmod-notes,
the `www-data` user must see itself as the owner of files to avoid chmod errors.

kentr/drupal-vm,kentr/drupal-vm,kentr/drupal-vm,kentr/drupal-vm,kentr/drupal-vm