Revert "UBUNTU: SAUCE: (noup) netfilter: x_tables: check for size overflow"

This reverts commit 7da29bde.

Dropping this SAUCE patch and replacing it by the upstream fix for
CVE-2016-3135:

  d157bd76 "netfilter: x_tables: check for size overflow"

The original fix (being reverted) was modified to keep only the 2nd check.

https://marc.info/?l=netfilter-devel&m=145778004016206&w=2



Signed-off-by: Luis Henriques <luis.henriques@canonical.com>
Acked-by: Tim Gardner <tim.gardner@canonical.com>
Signed-off-by: Kamal Mostafa <kamal@canonical.com>