Make page title in layout files translatable

Author: Anton Evers

lib/internal/Magento/Framework/View/Page/Config/Reader/Head.php

@@ -86,7 +86,7 @@ public function interpret(
                     break;
 
                 case self::HEAD_TITLE:
-                    $pageConfigStructure->setTitle($node);
+                    $pageConfigStructure->setTitle(__($node));
                     break;
 
                 case self::HEAD_META: