$html5shiv does not exists

It's documented, but the variable does not exists. How about adding it via hook_process_HOOK() until #865536: drupal_add_js() is missing the 'browsers' option has been fixed?

/**
 * Implements hook_process_HOOK().
 */
function html5_tools_process_html(&$variables) {
  // @todo: Append html5shim until #865536: drupal_add_js() is missing the 'browsers' option is fixed.
  $default_query_string = variable_get('css_js_query_string', '0');
  $variables['scripts'] .= '<!--[if lt IE 9]>' . "\n";
  $variables['scripts'] .= '<script src="' . file_create_url(drupal_get_path('module', 'html5_tools') . '/js/html5shiv-printshiv.js') . '?' . $default_query_string . '"></script>' . "\n";
  $variables['scripts'] .= '<![endif]-->' . "\n";
}

I've added this to my themes template.php.