[rhythmbox/wip/hadess/provide-old-id] data: Add "provides" for the old desktop filename

[Bastien Nocera <hadess src gnome org>]

commit 92dd39c55dfa760849d5ac1c81bd38ddd67fc4a0
Author: Bastien Nocera <hadess hadess net>
Date:   Wed Feb 17 13:23:22 2021 +0100

    data: Add "provides" for the old desktop filename
    
    See https://blogs.gnome.org/hughsie/2019/04/23/remember-the-extra-metadata-if-you-change-a-desktop-id/

 data/org.gnome.Rhythmbox3.appdata.xml.in | 3 +++
 1 file changed, 3 insertions(+)
---
diff --git a/data/org.gnome.Rhythmbox3.appdata.xml.in b/data/org.gnome.Rhythmbox3.appdata.xml.in
index ac714bc98..85040cf27 100644
--- a/data/org.gnome.Rhythmbox3.appdata.xml.in
+++ b/data/org.gnome.Rhythmbox3.appdata.xml.in
@@ -31,6 +31,9 @@
   <update_contact>jmatthew gnome org</update_contact>
   <project_group>GNOME</project_group>
   <translation type="gettext">rhythmbox</translation>
+  <provides>
+    <id>rhythmbox.desktop</id>
+  </provides>
   <releases>
     <release version="3.4.4" date="2020-01-05">
       <description>