batman-adv: upgrade package to latest release 2013.1.0 & batman-adv script removal

With the netifd integration the batman-adv script broke. This script
can safely be removed because '/etc/init.d/network' reloads the
batman-adv interfaces as well (thanks to netifd).
    
Signed-off-by: Marek Lindner <lindner_marek@yahoo.de>



git-svn-id: svn://svn.openwrt.org/openwrt@35867 3c298f89-4303-0410-b956-a3cf2f4a3e73