[gtk-osx] Add autoconf-archive, now required by Gtk+ master.

[John Ralls <jralls src gnome org>]

commit f4680f3f6e1fef9152df951cf345671cc5d3e24b
Author: John Ralls <jralls ceridwen us>
Date:   Sat Nov 5 12:51:06 2016 -0700

    Add autoconf-archive, now required by Gtk+ master.

 modulesets-stable/bootstrap.modules |    7 +++++++
 1 files changed, 7 insertions(+), 0 deletions(-)
---
diff --git a/modulesets-stable/bootstrap.modules b/modulesets-stable/bootstrap.modules
index dbcae9b..47ad38e 100644
--- a/modulesets-stable/bootstrap.modules
+++ b/modulesets-stable/bootstrap.modules
@@ -91,6 +91,12 @@
     </dependencies>
   </autotools>
 
+  <autotools id="autoconf-archive" autogen-sh="configure">
+    <branch repo="ftp.gnu.org"
+            module="autoconf-archive/autoconf-archive-2016.09.16.tar.xz"
+            version="2016-09.16"/>
+  </autotools>
+
   <autotools id="libtool" autogen-sh="configure" bootstrap="true">
     <branch repo="ftp.gnu.org"
             module="libtool/libtool-2.4.6.tar.gz" version="2.4.6"/>
@@ -233,6 +239,7 @@
       <dep package="cmake"/>
       <dep package="m4"/>      <!-- Can be skipped for Leopard and later -->
       <dep package="autoconf" />
+      <dep package="autoconf-archive" />
       <dep package="libtool" />
       <dep package="automake-1.10" />
       <dep package="automake-1.11" />