wireless tools: bump to version 30.pre9

It seems there won't be any new release soon (or ever), so update to the
latest pre version for better functionality (non-ASCII ESSIDs, bigger
scan buffer for example).
Also update the bzero deprecation patch since it missed some instances.

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>