[gnome-control-center] background: Use AM_CPPFLAGS rather than INCLUDES

[Bastien Nocera <hadess src gnome org>]

commit 335f8711c3a78c87a4b6bdcd7db274a17043fe1c
Author: Christophe Fergeau <cfergeau redhat com>
Date:   Wed Jun 25 11:56:03 2014 +0200

    background: Use AM_CPPFLAGS rather than INCLUDES
    
    This is deprecated in newer automake versions, and this causes warnings
    with automake 1.14:
    panels/printers/Makefile.am:3: warning: 'INCLUDES' is the old name for
    AM_CPPFLAGS' (or '*_CPPFLAGS')
    
    https://bugzilla.gnome.org/show_bug.cgi?id=732189

 panels/background/Makefile.am |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/panels/background/Makefile.am b/panels/background/Makefile.am
index c3de612..ccb8017 100644
--- a/panels/background/Makefile.am
+++ b/panels/background/Makefile.am
@@ -7,7 +7,7 @@ dist_slideshowicon_DATA = slideshow-symbolic.svg
 slideshowemblemdir = $(datadir)/icons/hicolor/scalable/emblems/
 dist_slideshowemblem_DATA = slideshow-emblem.svg
 
-INCLUDES =                                             \
+AM_CPPFLAGS =                                          \
        $(PANEL_CFLAGS)                                 \
        $(BACKGROUND_PANEL_CFLAGS)                      \
        -DGNOMELOCALEDIR="\"$(datadir)/locale\""        \