Multisite: Add annotations for extended `WP_Site` properties.

Props ryanplas.
Fixes #37932.

Built from https://develop.svn.wordpress.org/trunk@38630


git-svn-id: http://core.svn.wordpress.org/trunk@38573 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-site.php

@@ -15,8 +15,12 @@
  *
  * @since 4.5.0
  *
- * @property int $id
- * @property int $network_id
+ * @property int    $id
+ * @property int    $network_id
+ * @property string $blogname
+ * @property string $siteurl
+ * @property int    $post_count
+ * @property string $home
  */
 final class WP_Site {
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.7-alpha-38629';
+$wp_version = '4.7-alpha-38630';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.