tools: add autoconf-archive

tools: add autoconf-archive

Some autotools based build systems are using autoconf-archive scripts
and are expecting them to almost always be available. This is not
required for regular releases as tar balls generated for releases
commonly have existing configure script. This is rather intended to be
used with autotools.mk's autoreconf and in cases it is not always
possible to get release tar ball.

Including this adds little to no overhead in terms of build time as
those are just m4 scripts copied to an appropriate location.

Signed-off-by: Karel Kočí <karel.koci@nic.cz>
[fixed From: to match SoB]
Signed-off-by: Petr Štetiar <ynezz@true.cz>