Plugins: In plugin_basename() sort plugin paths before resolving symlinks.

`arsort()` sorts the paths reverse-alphabetically while preserving the keys. It results in a longer path being listed before a shorter one with the same base directory(ies).

Props jdgrimes, ocean90.
Fixes #28441.
Built from https://develop.svn.wordpress.org/trunk@37983


git-svn-id: http://core.svn.wordpress.org/trunk@37924 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/plugin.php

@@ -731,6 +731,7 @@ function plugin_basename( $file ) {
 	// $wp_plugin_paths contains normalized paths.
 	$file = wp_normalize_path( $file );
 
+	arsort( $wp_plugin_paths );
 	foreach ( $wp_plugin_paths as $dir => $realdir ) {
 		if ( strpos( $file, $realdir ) === 0 ) {
 			$file = $dir . substr( $file, strlen( $realdir ) );