Call out the package with the malformed instructions

See https://www.woltlab.com/community/thread/313016-gel%C3%B6st-update-auf-6-1-10-auf-6-1-12-startet-nicht-fehler-gel%C3%B6st-cache-leeren/

Author: dtdesign

wcfsetup/install/files/lib/system/package/PackageInstallationNodeBuilder.class.php

@@ -655,7 +655,9 @@ protected function buildPluginNodes(array $instructions)
         if ($count === 0) {
             // Abort if an empty list of instructions is received. This most likely indicates that
             // the update instructions have been erroneously discarded.
-            throw new \Exception('Received an empty list of instructions.');
+            $action = $this->installation->getAction();
+            $name = $this->installation->getArchive()->getPackageInfo('name');
+            throw new \Exception("Received an empty list of {$action} instructions for package '{$name}'.");
         }
 
         if (!empty($this->node)) {