openvswitch: update to version 2.11.6 (security fix)

Fixes CVEs:
- CVE-2020-35498
- In DPDK: CVE-2015-8011 and CVE-2020-27827
- In LLDP: CVE-2019-14818, CVE-2020-10722, CVE-2020-10723 and CVE-2020-10724

Removed patches:
- 0001-compat-Include-confirm_neigh-parameter-if-needed.patch because they
are included in this release as it was backported
- 0010-acinclude-Fix-build-with-kernels-with-prandom-moved-.patch
included in this release as it was backported

Other patches were refreshed.

Signed-off-by: Josef Schlehofer <pepe.schlehofer@gmail.com>

net/openvswitch/patches/0007-ovs-lib-fix-install_dir.patch

@@ -10,8 +10,6 @@ Signed-off-by: Yousong Zhou <yszhou4tech@gmail.com>
  utilities/ovs-lib.in | 5 ++++-
  1 file changed, 4 insertions(+), 1 deletion(-)
 
-diff --git a/utilities/ovs-lib.in b/utilities/ovs-lib.in
-index 5f36b7d44..7ba18b532 100644
 --- a/utilities/ovs-lib.in
 +++ b/utilities/ovs-lib.in
 @@ -159,7 +159,10 @@ install_dir () {