Update to the latest version of buildah

Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>

vendor/github.com/containers/common/pkg/config/util_windows.go

@@ -0,0 +1,12 @@
+// +build windows
+
+package config
+
+import (
+	"github.com/pkg/errors"
+)
+
+// getRuntimeDir returns the runtime directory
+func getRuntimeDir() (string, error) {
+	return "", errors.New("this function is not implemented for windows")
+}