bug#21444: [PATCH] Add instructions about install autoconf on OS X

[Zhang Kai Yu]

From d89a72e58075e023b236e5652a8489302770208e Mon Sep 17 00:00:00 2001
From: Zhang Kai Yu <yeannylam@gmail.com>
Date: Mon, 7 Sep 2015 21:14:11 +0800
Subject: [PATCH] Add doc about install missing tools on OS X

---
 autogen.sh | 1 +
 1 file changed, 1 insertion(+)

diff --git a/autogen.sh b/autogen.sh
index bc9c5a0..6b5eeb0 100755
--- a/autogen.sh
+++ b/autogen.sh
@@ -178,6 +178,7 @@ and re-run this script.
 Otherwise, please try installing them.
 On systems using rpm and yum, try: "yum install PACKAGE"
 On systems using dpkg and apt, try: "apt-get install PACKAGE"
+On systems using brew, try: "brew install PACKAGE"
 Then re-run this script.
 
 If you do not have permission to do this, or if the version provided
-- 
2.3.8 (Apple Git-58)