Docs: Add missing description for $wp_locale global.

Props mukesh27.
See #45604, #47110.

git-svn-id: https://develop.svn.wordpress.org/trunk@45737 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/template.php

@@ -757,7 +757,7 @@ function meta_form( $post = null ) {
  * @since 0.71
  * @since 4.4.0 Converted to use get_comment() instead of the global `$comment`.
  *
- * @global WP_Locale  $wp_locale
+ * @global WP_Locale $wp_locale WordPress date and time locale object.
  *
  * @param int|bool $edit      Accepts 1|true for editing the date, 0|false for adding the date.
  * @param int|bool $for_post  Accepts 1|true for applying the date to a post, 0|false for a comment.
@@ -1905,7 +1905,7 @@ function _admin_search_query() {
  *
  * @global string    $hook_suffix
  * @global string    $admin_body_class
- * @global WP_Locale $wp_locale
+ * @global WP_Locale $wp_locale        WordPress date and time locale object.
  *
  * @param string $title      Optional. Title of the Iframe page. Default empty.
  * @param bool   $deprecated Not used.