[system-switch-displaymanager] add BR on python

[Than Ngo]

commit b891d90d26e20dbd35ab77d59f0a8a2c51760827
Author: Than Ngo <than at redhat.com>
Date:   Thu Feb 26 22:48:32 2015 +0100

    add BR on python

 system-switch-displaymanager.spec | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/system-switch-displaymanager.spec b/system-switch-displaymanager.spec
index ac61119..406da9f 100644
--- a/system-switch-displaymanager.spec
+++ b/system-switch-displaymanager.spec
@@ -9,6 +9,7 @@ Group: User Interface/Desktops
 Buildroot: %(mktemp -ud %{_tmppath}/%{name}-%{version}-%{release}-XXXXXX)
 BuildArch: noarch
 Requires: polkit
+BuildRequires: python
 BuildRequires: intltool
 BuildRequires: gettext
 BuildRequires: desktop-file-utils