[gnome-backgrounds] build: add Signpost_of_the_Shadows.jpg to Makefile.am

[Kalev Lember <klember src gnome org>]

commit 2b394dd5379d5ff6d9eeb43f069bfb69e5e22f98
Author: Jürg Billeter <j bitron ch>
Date:   Thu Sep 14 19:26:57 2017 +0200

    build: add Signpost_of_the_Shadows.jpg to Makefile.am

 backgrounds/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/backgrounds/Makefile.am b/backgrounds/Makefile.am
index b7cdb64..844a239 100644
--- a/backgrounds/Makefile.am
+++ b/backgrounds/Makefile.am
@@ -16,6 +16,7 @@ background_DATA =\
        Mirror.jpg \
        Road.jpg \
        Sandstone.jpg \
+       Signpost_of_the_Shadows.jpg \
        Stones.jpg \
        Terraform-green.jpg \
        Waterfalls.jpg \