Filesystem: Add `return` statement to `WP_Filesystem_ftpsockets->rmdir`

Props tymvie.
Fixes #39405.

Built from https://develop.svn.wordpress.org/trunk@39644


git-svn-id: http://core.svn.wordpress.org/trunk@39584 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-filesystem-ftpsockets.php

@@ -470,9 +470,10 @@ class WP_Filesystem_ftpsockets extends WP_Filesystem_Base {
 	 *
 	 * @param string $path
 	 * @param bool $recursive
+	 * @return bool
 	 */
 	public function rmdir($path, $recursive = false ) {
-		$this->delete($path, $recursive);
+		return $this->delete($path, $recursive);
 	}
 
 	/**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.8-alpha-39643';
+$wp_version = '4.8-alpha-39644';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.