[gnome-multi-writer] trivial: Fix up the example spec file

[Richard Hughes <rhughes src gnome org>]

commit 4211b9b2846d2dd76872f37ae4420a23b46d9867
Author: Richard Hughes <richard hughsie com>
Date:   Sun Feb 22 18:53:37 2015 +0000

    trivial: Fix up the example spec file

 contrib/gnome-multi-writer.spec.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/contrib/gnome-multi-writer.spec.in b/contrib/gnome-multi-writer.spec.in
index eaeefd9..62e8ec7 100644
--- a/contrib/gnome-multi-writer.spec.in
+++ b/contrib/gnome-multi-writer.spec.in
@@ -19,6 +19,7 @@ BuildRequires: libcanberra-devel >= 0.10
 BuildRequires: libgusb-devel >= 0.2.4
 BuildRequires: libudisks2-devel
 BuildRequires: libgudev1-devel
+BuildRequires: libappstream-glib
 
 Requires:      gnome-icon-theme-extras