performance-art.fr/sites/all/modules/contrib/admin/admin_menu/admin_menu_toolbar/admin_menu_toolbar.install

<?php

/**
 * @file
 * Installation functionality for Administration menu toolbar module.
 */

/**
 * Implements hook_install().
 */
function admin_menu_toolbar_install() {
  // Required to load JS/CSS in hook_init() after admin_menu.
  db_update('system')
    ->fields(array('weight' => 101))
    ->condition('type', 'module')
    ->condition('name', 'admin_menu_toolbar')
    ->execute();
}

/**
 * Set module weight to a value higher than admin_menu.
 *
 * At this point, admin_menu should have a weight of 100. To account for
 * customized weights, we increase the weight relatively.
 *
 * @see admin_menu_toolbar_install()
 */
function admin_menu_toolbar_update_6300() {
  $weight = db_query("SELECT weight FROM {system} WHERE type = 'module' AND name = 'admin_menu'")->fetchField();
  $weight++;
  db_update('system')
    ->fields(array('weight' => $weight))
    ->condition('type', 'module')
    ->condition('name', 'admin_menu_toolbar')
    ->execute();
}