[mutter] Mutter-Wayland: fix build failure

[David King <davidk src gnome org>]

commit 6b8959916c70e05d8c3bf072e10b585d9c71c40b
Author: Magdalen Berns <thisMagpie live com>
Date:   Mon Oct 28 16:27:29 2013 +0000

    Mutter-Wayland: fix build failure
    
    Bug https://bugzilla.gnome.org/show_bug.cgi?id=710565

 Makefile.am  |    2 ++
 configure.ac |    1 +
 2 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/Makefile.am b/Makefile.am
index 223b44b..114419e 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -8,3 +8,5 @@ EXTRA_DIST = HACKING MAINTAINERS rationales.txt
 DISTCLEANFILES = intltool-extract intltool-merge intltool-update po/stamp-it po/.intltool-merge-cache
 
 DISTCHECK_CONFIGURE_FLAGS = --enable-gtk-doc
+
+ACLOCAL_AMFLAGS = -I m4 ${ACLOCAL_FLAGS}
diff --git a/configure.ac b/configure.ac
index 75b3829..27183be 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1,4 +1,5 @@
 AC_PREREQ(2.50)
+AC_CONFIG_MACRO_DIR([m4])
 
 m4_define([mutter_major_version], [3])
 m4_define([mutter_minor_version], [10])