REST API: Mark WP_REST_Server::get_raw_data as static.

This is just a utility function for getting the request body, not
tied to the server class.

Fixes #34768.

Built from https://develop.svn.wordpress.org/trunk@35741


git-svn-id: http://core.svn.wordpress.org/trunk@35705 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/class-wp-rest-server.php

@@ -1158,7 +1158,7 @@ class WP_REST_Server {
 	 *
 	 * @return string Raw request data.
 	 */
-	public function get_raw_data() {
+	public static function get_raw_data() {
 		global $HTTP_RAW_POST_DATA;
 
 		/*

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-beta4-35740';
+$wp_version = '4.4-beta4-35741';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.