OVS 2.13.1

Port patches to windows: "conntrack: Fix conntrack new state"

Port following commits to windows to fix the conntrack new state issue:
- a867c010ee9183885ee9d3eb76a0005c075c4d2e
- ac23d20fc90da3b1c9b2117d1e22102e99fba006

Signed-off-by: Rui Cao <rcao@vmware.com>

v2.12.9-win64

v2.12.9-win64

v2.12.1 win64 package

v2.12.1 win64 package

v2.13.0 win64 package

Open vSwitch version 2.13.0 win64 package.