The attached patch advances racket to the latest released version 6.7
From 30a1d275376ed2f156314c5f99c4a4a9ba69d2b4 Mon Sep 17 00:00:00 2001
From: Karn Kallio <kkallio@skami.org>
Date: Fri, 4 Nov 2016 01:13:58 -0400
Subject: [PATCH] racket : advance to the latest release 6.7