[gdm] systemd: send SIGHUP to gdm on reload

[Ray Strode <halfline src gnome org>]

commit 80c25d244f1339b65b7ea8fb157d968ebcbaae22
Author: Sam Spilsbury <sam endlessm com>
Date:   Tue Sep 5 14:34:33 2017 -0400

    systemd: send SIGHUP to gdm on reload
    
    https://bugzilla.gnome.org/show_bug.cgi?id=787288

 data/gdm.service.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/data/gdm.service.in b/data/gdm.service.in
index fb0ffdc..72201c1 100644
--- a/data/gdm.service.in
+++ b/data/gdm.service.in
@@ -28,6 +28,7 @@ BusName=org.gnome.DisplayManager
 StandardOutput=syslog
 StandardError=inherit
 EnvironmentFile=-@LANG_CONFIG_FILE@
+ExecReload=/bin/kill -SIGHUP $MAINPID
 
 [Install]
 Alias=display-manager.service