added m4_include stuff

i'm not good at autoconf stuff.
but following error (during configure) was fixed with this patch.

<pre>
~/hacking/yxa/build$ ../configure
checking for gcc... gcc
checking whether the C compiler works... yes
checking for C compiler default output file name... a.out
checking for suffix of executables... 
checking whether we are cross compiling... no
checking for suffix of object files... o
checking whether we are using the GNU C compiler... yes
checking whether gcc accepts -g... yes
checking for gcc option to accept ISO C89... none needed
checking for a BSD-compatible install... /usr/bin/install -c
checking for erl... /usr/bin/erl
checking for erlc... /usr/bin/erlc
checking for erlc... /usr/bin/erlc
checking for erl... /usr/bin/erl
../configure: line 3148: syntax error near unexpected token `$REQUIRE_ERLANG_MIN,$REQUIRE_ERLANG_MAX'
../configure: line 3148: `              ERLANG_VERSION_CHECK($REQUIRE_ERLANG_MIN,$REQUIRE_ERLANG_MAX)
'</pre>

and my config:
<pre>
~/hacking/yxa$ uname -a
Linux svr.mz 3.5.0-30-generic #51~precise1-Ubuntu SMP Wed May 15 08:48:19 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux
~/hacking/yxa$ autoconf --version
autoconf (GNU Autoconf) 2.68
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+/Autoconf: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>, <http://gnu.org/licenses/exceptions.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.

Written by David J. MacKenzie and Akim Demaille.
</pre>