update buildah to latest and use new network stack

Make sure buildah uses the new network stack.

Signed-off-by: Paul Holzinger <pholzing@redhat.com>

vendor/github.com/containers/buildah/chroot/seccomp.go

@@ -3,6 +3,9 @@
 package chroot
 
 import (
+	"io/ioutil"
+
+	"github.com/containers/common/pkg/seccomp"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
 	libseccomp "github.com/seccomp/libseccomp-golang"
@@ -171,3 +174,27 @@ func setSeccomp(spec *specs.Spec) error {
 	}
 	return nil
 }
+
+func setupSeccomp(spec *specs.Spec, seccompProfilePath string) error {
+	switch seccompProfilePath {
+	case "unconfined":
+		spec.Linux.Seccomp = nil
+	case "":
+		seccompConfig, err := seccomp.GetDefaultProfile(spec)
+		if err != nil {
+			return errors.Wrapf(err, "loading default seccomp profile failed")
+		}
+		spec.Linux.Seccomp = seccompConfig
+	default:
+		seccompProfile, err := ioutil.ReadFile(seccompProfilePath)
+		if err != nil {
+			return errors.Wrapf(err, "opening seccomp profile (%s) failed", seccompProfilePath)
+		}
+		seccompConfig, err := seccomp.LoadProfile(string(seccompProfile), spec)
+		if err != nil {
+			return errors.Wrapf(err, "loading seccomp profile (%s) failed", seccompProfilePath)
+		}
+		spec.Linux.Seccomp = seccompConfig
+	}
+	return nil
+}