Update libnetwork to fix port binding issue

This new version has a patch cherry-picked from here:
moby/libnetwork#1805

This patch is meant to avoid cases in which libnetwork internal state
gets inconsistent in case of crashes.

Signed-off-by: Leandro Motta Barros <[email protected]>
Change-type: patch

Author: lmbarros

vendor.conf

@@ -47,7 +47,7 @@ github.com/grpc-ecosystem/go-grpc-middleware        df0f91b29bbbdfc3a686a7a8edbe
 # libnetwork
 
 # When updating, also update LIBNETWORK_COMMIT in hack/dockerfile/install/proxy.installer accordingly
-github.com/docker/libnetwork                        4d0934611265197ec35c1fcb6233c0e3757aecc3 https://github.com/balena-os/balena-libnetwork
+github.com/docker/libnetwork                        ace5cf58e62c8569b12363b365ee44422cb8c391 https://github.com/balena-os/balena-libnetwork
 github.com/docker/go-events                         e31b211e4f1cd09aa76fe4ac244571fab96ae47f
 github.com/armon/go-radix                           e39d623f12e8e41c7b5529e9a9dd67a1e2261f80
 github.com/armon/go-metrics                         eb0af217e5e9747e41dd5303755356b62d28e3ec