[gnome-power-manager] Don't break when generating ChangeLog for a tarball

[Richard Hughes <rhughes src gnome org>]

commit 1c2e16f06ab4f0ab299d1ff9849aa690ff90641b
Author: Richard Hughes <richard hughsie com>
Date:   Tue May 5 16:33:32 2009 +0100

    Don't break when generating ChangeLog for a tarball
---
 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/configure.ac b/configure.ac
index d781540..194230e 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,6 +3,7 @@ AC_PREREQ(2.60)
 AC_INIT(gnome-power-manager, 2.27.1)
 AC_CONFIG_SRCDIR(src)
 AM_INIT_AUTOMAKE(AC_PACKAGE_NAME, AC_PACKAGE_VERSION)
+AM_INIT_AUTOMAKE([foreign])
 AM_CONFIG_HEADER(config.h)
 AC_CONFIG_MACRO_DIR([m4])