[gnome-software/gnome-3-20] trivial: Add a BR for the example spec file

[Richard Hughes <rhughes src gnome org>]

commit 11832433e078002562091189a8a6e6b5118ddd3c
Author: Richard Hughes <richard hughsie com>
Date:   Tue Apr 19 21:23:16 2016 +0100

    trivial: Add a BR for the example spec file

 contrib/gnome-software.spec.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/contrib/gnome-software.spec.in b/contrib/gnome-software.spec.in
index a606ee1..331e235 100644
--- a/contrib/gnome-software.spec.in
+++ b/contrib/gnome-software.spec.in
@@ -32,6 +32,7 @@ BuildRequires: gsettings-desktop-schemas-devel
 BuildRequires: libappstream-glib-devel >= 0.5.11
 BuildRequires: fwupd-devel
 BuildRequires: json-glib-devel
+BuildRequires: polkit-devel
 
 # this is not a library version
 %define gs_plugin_version               9