[rygel] data: Add missing SystemdService for DBus activation

[Bastien Nocera <hadess src gnome org>]

commit b5cecc3b61359d97033a98e435d0fc3b417f1203
Author: Jan Alexander Steffens (heftig) <jan steffens gmail com>
Date:   Mon May 23 21:03:52 2016 +0200

    data: Add missing SystemdService for DBus activation
    
    Without this, DBus could start an independent instance of rygel.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766332

 data/org.gnome.Rygel1.service.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/org.gnome.Rygel1.service.in b/data/org.gnome.Rygel1.service.in
index dbc3029..120f103 100644
--- a/data/org.gnome.Rygel1.service.in
+++ b/data/org.gnome.Rygel1.service.in
@@ -1,3 +1,4 @@
 [D-BUS Service]
 Name=org.gnome.Rygel1
 Exec=@bindir@/rygel
+SystemdService=rygel.service