[gnome-settings-daemon] power: Add missing source to stand-alone program

[Bastien Nocera <hadess src gnome org>]

commit a41174d679bf6677d97d9ff0af24814459116b15
Author: Bastien Nocera <hadess hadess net>
Date:   Mon Sep 26 19:34:51 2016 +0200

    power: Add missing source to stand-alone program
    
    https://bugzilla.gnome.org/show_bug.cgi?id=741688

 plugins/power/Makefile.am |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/power/Makefile.am b/plugins/power/Makefile.am
index 0ff0d06..149a4ec 100644
--- a/plugins/power/Makefile.am
+++ b/plugins/power/Makefile.am
@@ -74,6 +74,7 @@ gsd_test_power_SOURCES =                              \
        gsm-inhibitor-flag.h                            \
        gsm-presence-flag.h                             \
        gsm-manager-logout-mode.h                       \
+       gsd-power-constants.h                           \
        test-power.c
 
 gsd_test_power_CFLAGS = $(libpower_la_CFLAGS)