update vendor

Signed-off-by: Jess Frazelle <acidburn@microsoft.com>

vendor/github.com/docker/go-connections/proxy/logger.go

@@ -0,0 +1,11 @@
+package proxy
+
+type logger interface {
+	Printf(format string, args ...interface{})
+}
+
+type noopLogger struct{}
+
+func (l *noopLogger) Printf(_ string, _ ...interface{}) {
+	// Do nothing :)
+}