[gdm/unlock-keyring] Launch systemd service with KeyringMode=shared

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 2d57f45962dca4975424c20312d7e04f6ff5d55e
Author: Michael Catanzaro <mcatanzaro igalia com>
Date:   Mon Nov 5 12:37:34 2018 -0600

    Launch systemd service with KeyringMode=shared
    
    This allows gdm to pass the LUKS password through to PAM.
    
    The login keyring will now be unlocked automatically if autologin is
    enabled!

 data/gdm.service.in | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/data/gdm.service.in b/data/gdm.service.in
index 72201c1f..57d60ada 100644
--- a/data/gdm.service.in
+++ b/data/gdm.service.in
@@ -29,6 +29,7 @@ StandardOutput=syslog
 StandardError=inherit
 EnvironmentFile=-@LANG_CONFIG_FILE@
 ExecReload=/bin/kill -SIGHUP $MAINPID
+KeyringMode=shared
 
 [Install]
 Alias=display-manager.service