[murrine] Enable silent build with automake 1.11.

[Andrea Cimitan <acimitan src gnome org>]

commit cb25f06ecf8db23d4252af65383c02aef69462b3
Author: Andrea <andrea cimitan gmail com>
Date:   Wed Apr 21 11:54:54 2010 +0200

    Enable silent build with automake 1.11.

 configure.ac |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index f2d2f62..850656b 100644
--- a/configure.ac
+++ b/configure.ac
@@ -3,6 +3,9 @@ AC_CONFIG_SRCDIR([README])
 
 AM_INIT_AUTOMAKE
 
+# Use AM_SILENT_RULES if present
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
+
 dnl Initialize maintainer mode
 AM_MAINTAINER_MODE