Docs: Add missing description for $wp_query and $wp_the_query globals.

Props mukesh27.
See #45604, #47110.

git-svn-id: https://develop.svn.wordpress.org/trunk@45739 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/link-template.php

@@ -2322,7 +2322,7 @@ function next_posts( $max_page = 0, $echo = true ) {
  * @since 2.7.0
  *
  * @global int      $paged
- * @global WP_Query $wp_query
+ * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string $label    Content for link text.
  * @param int    $max_page Optional. Max pages. Default 0.
@@ -2460,7 +2460,7 @@ function previous_posts_link( $label = null ) {
  *
  * @since 2.8.0
  *
- * @global WP_Query $wp_query
+ * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string|array $args {
  *     Optional. Arguments to build the post pages link navigation.
@@ -2801,7 +2801,7 @@ function get_comments_pagenum_link( $pagenum = 1, $max_page = 0 ) {
  *
  * @since 2.7.1
  *
- * @global WP_Query $wp_query
+ * @global WP_Query $wp_query WordPress Query object.
  *
  * @param string $label    Optional. Label for link text. Default empty.
  * @param int    $max_page Optional. Max page. Default 0.