Core Upgrader success statistics: Pass the version of WordPress we're upgrading from, as well as the version being upgraded to. Props nacin. See #25772 for trunk

git-svn-id: https://develop.svn.wordpress.org/trunk@26016 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/class-wp-upgrader.php

@@ -1420,6 +1420,7 @@ class Core_Upgrader extends WP_Upgrader {
 				'fs_method'        => $wp_filesystem->method,
 				'fs_method_forced' => defined( 'FS_METHOD' ) || has_filter( 'filesystem_method' ),
 				'time_taken'       => time() - $start_time,
+				'reported'         => $wp_version,
 				'attempted'        => $current->version,
 			);