From a160bbbc09fb1336ff61783704c3037190cab6b2 Mon Sep 17 00:00:00 2001
From: Yasuhiro Matsumoto <mattn.jp@gmail.com>
Date: Fri, 9 Dec 2016 09:08:59 +0900
Subject: [PATCH] fix tree for tools/upgrade.go

Close #361
---
 tool/upgrade.go | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tool/upgrade.go b/tool/upgrade.go
index baadd0f..adfe363 100644
--- a/tool/upgrade.go
+++ b/tool/upgrade.go
@@ -1,3 +1,5 @@
+// +build ignore
+
 package main
 
 import (