[sapwood] enable silent rules for compilation

[Sven Herzberg <herzi src gnome org>]

commit 69707cc101d6b55e1a348ade99ae8a1aaf147ba7
Author: Sven Herzberg <herzi gnome-de org>
Date:   Fri Jun 11 12:55:07 2010 +0200

    enable silent rules for compilation
    
    * configure.in: if available, enable silent rules for the compilation

 configure.in |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.in b/configure.in
index 185680c..8195703 100644
--- a/configure.in
+++ b/configure.in
@@ -2,6 +2,8 @@ AC_INIT([server/sapwood-server.c])
 AC_CONFIG_HEADERS([config.h])
 AM_INIT_AUTOMAKE(sapwood, 3.1.1)
 
+m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])])
+
 dnl Initialize maintainer mode
 AM_MAINTAINER_MODE