[NETFILTER]: link 'netfilter' before ipv4

Staticaly linked nf_conntrack_ipv4 requires nf_conntrack. but currently
nf_conntrack is linked after it. This changes the order of ipv4 and netfilter
to fix this.
Signed-off-by: NKrzysztof Oledzki <olenf@ans.pl>
Signed-off-by: NYasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp>
Signed-off-by: NHarald Welte <laforge@netfilter.org>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

net/Makefile

@@ -15,8 +15,8 @@ obj-$(CONFIG_NET)		+= $(tmp-y)
 # LLC has to be linked before the files in net/802/
 obj-$(CONFIG_LLC)		+= llc/
 obj-$(CONFIG_NET)		+= ethernet/ 802/ sched/ netlink/
-obj-$(CONFIG_INET)		+= ipv4/
 obj-$(CONFIG_NETFILTER)		+= netfilter/
+obj-$(CONFIG_INET)		+= ipv4/
 obj-$(CONFIG_XFRM)		+= xfrm/
 obj-$(CONFIG_UNIX)		+= unix/
 ifneq ($(CONFIG_IPV6),)