[rhythmbox] configure.ac: use AM_SILENT_RULES where possible

[Jonathan Matthew <jmatthew src gnome org>]

commit 05c9d56419fb62c17c413f7259bbfec519534c28
Author: Jonathan Matthew <jonathan d14n org>
Date:   Tue Aug 18 22:12:37 2009 +1000

    configure.ac: use AM_SILENT_RULES where possible

 configure.ac |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 153d344..cb18f6d 100644
--- a/configure.ac
+++ b/configure.ac
@@ -12,6 +12,8 @@ AC_SUBST(ACLOCAL_AMFLAGS, "-I macros")
 
 AM_MAINTAINER_MODE
 
+m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])],)
+
 dnl XXXX hack to kill off all the libtool tags ...
 dnl it isn't like we are using C++ or Fortran.
 m4_define([_LT_AC_TAGCONFIG],[])