ANDROID: netfilter: xt_quota2: adding the original quota2 from xtables-addons

The original xt_quota in the kernel is plain broken:
  - counts quota at a per CPU level
    (was written back when ubiquitous SMP was just a dream)
  - provides no way to count across IPV4/IPV6.

This patch is the original unaltered code from:
  http://sourceforge.net/projects/xtables-addons

  at commit e84391ce665cef046967f796dd91026851d6bbf3

Bug: 120445421
Change-Id: I19d49858840effee9ecf6cff03c23b45a97efdeb
Signed-off-by: JP Abgrall <[email protected]>
[astrachan: Folded 4d33aa305871 ("netfilter: xt_quota2: fixup the quota2,
            and enable.") into this patch]
Signed-off-by: Alistair Strachan <[email protected]>
diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile
index 16895e0..9c87ed5 100644
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -191,6 +191,7 @@
 obj-$(CONFIG_NETFILTER_XT_MATCH_PKTTYPE) += xt_pkttype.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_POLICY) += xt_policy.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_QUOTA) += xt_quota.o
+obj-$(CONFIG_NETFILTER_XT_MATCH_QUOTA2) += xt_quota2.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_RATEEST) += xt_rateest.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_REALM) += xt_realm.o
 obj-$(CONFIG_NETFILTER_XT_MATCH_RECENT) += xt_recent.o