packaging:RPM: don't run autogen.

packaging:RPM: don't run autogen.

autogen is already run in maketarball.sh which generates
the tarball for the RPM.

This way, we don't have a rpm build dependency on autoconf.
Recent changes introduced a dependency into autoconf
version >= 2.60, so this fix allows the generated
source RPM to be built also on older platforms.

Signed-off-by: Michael Adam <obnox@samba.org>
Reviewed-by: Martin Schwenke <martin@meltin.net>
Reviewed-by: Amitay Isaacs <amitay@gmail.com>
Autobuild-User(master): Martin Schwenke <martins@samba.org>
Autobuild-Date(master): Mon Dec  9 05:47:00 CET 2013 on sn-devel-104

(Imported from commit c65ad56d40c2ac286dc9d726119d04384981d0b3)