kernel: netfilter.mk: Explicitly set the order of autoloaded modules

In my machine, the file is created with arptable_filter before
arp_tables. This can't happen because the former depends on the
latter.

So, instead of rely on wildcards (*.ko), set by hand the files to
be loaded in the correct order.

Signed-off-by: Jonh Wendell <jonh.wendell@oiwifi.com.br>

SVN-Revision: 36512