[gnome-settings-daemon] Fix distcheck

[Matthias Clasen <matthiasc src gnome org>]

commit b598dc571974f7adbb54fdf9c2e5577961c27c06
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Jun 4 23:31:20 2012 -0400

    Fix distcheck

 plugins/common/Makefile.am |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/plugins/common/Makefile.am b/plugins/common/Makefile.am
index 25522cc..64ababc 100644
--- a/plugins/common/Makefile.am
+++ b/plugins/common/Makefile.am
@@ -6,7 +6,8 @@ libcommon_la_SOURCES = \
 	gsd-keygrab.c		\
 	gsd-keygrab.h		\
 	gsd-input-helper.c	\
-	gsd-input-helper.h
+	gsd-input-helper.h	\
+	test-plugin.h
 
 libcommon_la_CPPFLAGS = \
 	$(AM_CPPFLAGS)