include missing sys/file.h for LOCK_EX

src/test/test-btrfs.c

@@ -1,6 +1,7 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
 #include <fcntl.h>
+#include <sys/file.h>
 
 #include "btrfs-util.h"
 #include "fd-util.h"

src/test/test-fs-util.c

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <sys/file.h>
 #include <unistd.h>
 
 #include "alloc-util.h"

src/test/test-lock-util.c

@@ -1,5 +1,6 @@
 /* SPDX-License-Identifier: LGPL-2.1-or-later */
 
+#include <sys/file.h>
 #include <unistd.h>
 
 #include "fd-util.h"