[rygel] data: Add [Install] section to rygel.service

[Bastien Nocera <hadess src gnome org>]

commit f14db2927d4f1e88baf1df8f5660d7281afea618
Author: Jan Alexander Steffens (heftig) <jan steffens gmail com>
Date:   Mon May 23 21:05:30 2016 +0200

    data: Add [Install] section to rygel.service
    
    This allows running `systemctl --user enable rygel` in order to
    automatically launch rygel at login. The default behavior is not
    changed.
    
    If lingering is also enabled for the user, rygel will be started
    at boot; this will then share media without needing a session.
    
    Since this disregards whether GSD would have launched rygel, it
    is primarily useful for headless servers and avoids the wrap-dbus
    hack used by the example system service.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=766332

 data/rygel.service.in |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/data/rygel.service.in b/data/rygel.service.in
index 77cc9d7..6144176 100644
--- a/data/rygel.service.in
+++ b/data/rygel.service.in
@@ -6,3 +6,6 @@ Type=dbus
 BusName=org.gnome.Rygel1
 ExecStart=@bindir@/rygel
 Restart=on-failure
+
+[Install]
+WantedBy=default.target