acinclude.m4 changed to prevent warning in aclocal

The modified acinclude.m4 fixes the warning while aclocal script is
executed:

acinclude.m4:9: warning: underquoted definition of FC_EXPAND_DIR
acinclude.m4:9:   run info '(automake)Extending aclocal'
acinclude.m4:9:   or see
http://www.gnu.org/software/automake/manual/automake.html#Extending-aclocal
Renewed configure scripts with GNU Autoconf 2.69

Renewing the (autotools based) build system to an actual version:

* Install GNU Autoconf 2.69/Automake 1.11.6/libtool 2.4.2
* Execute commands:
    $ aclocal
    $ autoheader
    $ touch config.rpath
    $ automake
    $ autoconf
    $ autoreconf -vif