[metacity] configure.ac: update AM_INIT_AUTOMAKE

[Alberts Muktupāvels <muktupavels src gnome org>]

commit c151c4c672d90c46b23d1f7a59e344fa6dfedb5c
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Sun Sep 20 01:59:01 2015 +0300

    configure.ac: update AM_INIT_AUTOMAKE

 configure.ac |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index dde451a..487ed10 100644
--- a/configure.ac
+++ b/configure.ac
@@ -30,9 +30,13 @@ dnl **************************************************************************
 
 AX_IS_RELEASE([git-directory])
 
-AM_INIT_AUTOMAKE([1.11.1 no-dist-gzip dist-xz])
-m4_ifdef([AM_SILENT_RULES],[AM_SILENT_RULES([yes])],)
+dnl **************************************************************************
+dnl Initialize automake
+dnl **************************************************************************
+
+AM_INIT_AUTOMAKE([1.13 no-dist-gzip dist-xz tar-ustar -Wno-portability])
 AM_MAINTAINER_MODE([enable])
+AM_SILENT_RULES([yes])
 
 # Honor aclocal flags
 AC_SUBST(ACLOCAL_AMFLAGS, "\${ACLOCAL_FLAGS}")