package/x11r7/xdriver_xf86-video-ati: Remove autoreconf

I forgot to remove that line during the last version bump:
http://lists.busybox.net/pipermail/buildroot/2015-March/120471.html



Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>