iptables 1.3.7 doesn't properly test for condition patch

[Andrew Schulman <andrex@alumni.utexas.net>]

I have kernel 2.6.21, iptables 1.3.7, and pom-ng 20070527.  I run

./runme --download --batch condition

and the patch applies successfully.  But when I build iptables, the
condition extension isn't included.  This is because
iptables-1.3.7/extensions/.condition-test tests for the existence of

$KERNEL_DIR/include/linux/netfilter_ipv4/ipt_condition.h

But the condition patch doesn't create that file any more; it now creates

$KERNEL_DIR/include/linux/netfilter/xt_condition.h

I guess that .condition-test needs to check for the kernel version that
it's being built against before deciding which header file it wants to look
for.

Thanks,
Andrew.