Remove hardcoded refs from ociartifact code

Fixes: https://issues.redhat.com/browse/RUN-3578

Signed-off-by: Nicola Sella <nsella@redhat.com>

vendor/github.com/opencontainers/selinux/go-selinux/selinux_stub.go

@@ -3,15 +3,11 @@
 
 package selinux
 
-func attrPath(string) string {
-	return ""
-}
-
-func readCon(string) (string, error) {
+func readConThreadSelf(string) (string, error) {
 	return "", nil
 }
 
-func writeCon(string, string) error {
+func writeConThreadSelf(string, string) error {
 	return nil
 }
 
@@ -81,6 +77,10 @@ func setKeyLabel(string) error {
 	return nil
 }
 
+func keyLabel() (string, error) {
+	return "", nil
+}
+
 func (c Context) get() string {
 	return ""
 }