criu: files-reg -- Create a complete path to deleted dentry

In case if several levels of dentries are missed we can't
restore them otherwise.

travis-ci: success for Multiple nested deleted dentries fix
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

criu/files-reg.c

@@ -197,10 +197,8 @@ again:
 		if ((ret = mknod(path, gfe->mode, gfe->rdev)) < 0)
 			msg = "Can't create node for ghost dev";
 	} else if (S_ISDIR(gfe->mode)) {
-		if ((ret = mkdir(path, gfe->mode)) < 0) {
-			pr_perror("Can't make ghost dir");
-			goto err;
-		}
+		if ((ret = mkdirpat(AT_FDCWD, path, gfe->mode)) < 0)
+			msg = "Can't make ghost dir";
 	} else {
 		if ((ret = mkreg_ghost(path, gfe->mode, gf, img)) < 0)
 			msg = "Can't create ghost regfile";