[gitg] Enable silent mode when using a modern automake

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 9417ec2a3225dd312293cb08cb25a691788b27c2
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Sun Sep 6 13:32:00 2009 +0200

    Enable silent mode when using a modern automake

 configure.ac |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 96a8fd8..94c7150 100644
--- a/configure.ac
+++ b/configure.ac
@@ -22,6 +22,7 @@ AM_INIT_AUTOMAKE([1.8 dist-bzip2 no-dist-gzip])
 
 AM_MAINTAINER_MODE
 AC_CONFIG_HEADERS(config.h)
+m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
 
 AC_PATH_PROG(GCONFTOOL, gconftool-2)
 IT_PROG_INTLTOOL([0.35.0])