[gtk-osx] Add python-six module, required by fontconfig master.

[John Ralls <jralls src gnome org>]

commit d7babb949b4f800925488bdd899551a48a856ae2
Author: John Ralls <jralls ceridwen us>
Date:   Fri Nov 4 15:30:27 2016 -0700

    Add python-six module, required by fontconfig master.

 modulesets-unstable/gtk-osx-bootstrap.modules |   10 ++++++++++
 1 files changed, 10 insertions(+), 0 deletions(-)
---
diff --git a/modulesets-unstable/gtk-osx-bootstrap.modules b/modulesets-unstable/gtk-osx-bootstrap.modules
index 01295ae..4c5ee42 100644
--- a/modulesets-unstable/gtk-osx-bootstrap.modules
+++ b/modulesets-unstable/gtk-osx-bootstrap.modules
@@ -177,11 +177,21 @@
     </dependencies>
   </distutils>
   
+  <distutils id="python-six">
+    <branch module="s/six/six-1.10.0.tar.gz" repo="pypi" version="1.10.0"
+            checkoutdir="six"/>
+    <dependencies>
+      <dep package="libxml2"/>
+      <dep package="libxslt"/>
+    </dependencies>
+  </distutils>
+
   <autotools id="fontconfig" autogenargs="--disable-docs">
     <branch repo="freedesktop"/>
     <dependencies>
       <dep package="freetype"/>
       <dep package="lxml"/>
+      <dep package="python-six"/>
     </dependencies>
   </autotools>