[releng] tarball-conversion: Add graphene

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 4898fc8d3f4e83669f7d4726a03a7ea293e0d5e9
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Jun 21 20:01:11 2016 -0500

    tarball-conversion: Add graphene
    
    Turns out it's hosted on download.gnome.org. Cool.

 tools/smoketesting/tarball-conversion.config |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/tools/smoketesting/tarball-conversion.config b/tools/smoketesting/tarball-conversion.config
index 6aba892..26d91d9 100644
--- a/tools/smoketesting/tarball-conversion.config
+++ b/tools/smoketesting/tarball-conversion.config
@@ -63,6 +63,7 @@
     <package name="colord-gtk"/>
     <package name="gnome-common"/>  # Huh?  Why is this external?
     <package name="geoclue"/>
+    <package name="graphene"/>
     <package name="libevdev"/>
     <package name="libinput"/>
     <package name="pulseaudio"/>