[gstreamermm] Build: fix silent build

[Marcin Kolny <mkolny src gnome org>]

commit 429de6e7c104934aa0628499df9781643cbe9837
Author: Marcin Kolny <marcin kolny gmail com>
Date:   Sat Aug 27 10:42:38 2016 +0200

    Build: fix silent build

 configure.ac |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index e897cf7..faa36be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -38,7 +38,7 @@ MM_CONFIG_DOCTOOL_DIR([docs])
 AC_SUBST([GSTREAMERMM_SO_VERSION], [0:0:0])
 
 AM_INIT_AUTOMAKE([1.9 subdir-objects -Wno-portability check-news dist-bzip2 no-define nostdinc tar-ustar])
-m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES])
+m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
 AM_MAINTAINER_MODE
 AC_ARG_VAR([ACLOCAL_FLAGS], [aclocal flags, e.g. -I <macro dir>])