[gtksourceview/wip/build-fixes: 1/2] build: don't define ACLOCAL_AMFLAGS (deprecated)

[Sébastien Wilmet <swilmet src gnome org>]

commit 3a3366d3349a5b77f4056e27516be3cdc4d14279
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Aug 30 12:41:07 2015 +0200

    build: don't define ACLOCAL_AMFLAGS (deprecated)
    
    See the FAQ entry "What's up with ACLOCAL_AMFLAGS?" at:
    https://wiki.gnome.org/Projects/GnomeCommon/Migration
    
    It relies on AC_CONFIG_MACRO_DIRS, which was introduced in Automake
    1.13. See:
    https://mail.gnome.org/archives/desktop-devel-list/2015-June/msg00009.html
    https://mail.gnome.org/archives/desktop-devel-list/2015-June/msg00021.html

 Makefile.am                           |    2 --
 configure.ac                          |    2 +-
 tests/syntax-highlighting/Makefile.am |    2 --
 3 files changed, 1 insertions(+), 5 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index de898fd..fef1c27 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -1,5 +1,3 @@
-ACLOCAL_AMFLAGS  = -I m4 ${ACLOCAL_FLAGS}
-
 SUBDIRS = gtksourceview po data docs tests
 
 pkgconfigdir = $(libdir)/pkgconfig
diff --git a/configure.ac b/configure.ac
index 6e46917..7f14bf0 100644
--- a/configure.ac
+++ b/configure.ac
@@ -49,7 +49,7 @@ AC_CONFIG_SRCDIR([gtksourceview/gtksourcebuffer.h])
 AC_CONFIG_HEADER([config.h])
 AC_CONFIG_MACRO_DIR([m4])
 
-AM_INIT_AUTOMAKE([1.11 tar-ustar dist-xz no-dist-gzip -Wno-portability foreign])
+AM_INIT_AUTOMAKE([1.13 tar-ustar dist-xz no-dist-gzip -Wno-portability foreign])
 AM_MAINTAINER_MODE([enable])
 
 m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
diff --git a/tests/syntax-highlighting/Makefile.am b/tests/syntax-highlighting/Makefile.am
index 319be41..ae46867 100644
--- a/tests/syntax-highlighting/Makefile.am
+++ b/tests/syntax-highlighting/Makefile.am
@@ -1,5 +1,3 @@
-ACLOCAL_AMFLAGS = -I m4
-
 EXTRA_DIST += README.W32
 
 if HAVE_DOXYGEN