8339850: Restore the interrupt status in FileSystemPreferences.lockFile()

Reviewed-by: bpb, djelinski, vtewari

Author: sbgoog

src/java.prefs/unix/classes/java/util/prefs/FileSystemPreferences.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2000, 2021, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2000, 2024, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
@@ -957,6 +957,8 @@ private boolean lockFile(boolean shared) throws SecurityException{
             try {
                 Thread.sleep(sleepTime);
             } catch(InterruptedException e) {
+                // Don't lose the interrupt.
+                Thread.currentThread().interrupt();
                 checkLockFile0ErrorCode(errorCode);
                 return false;
             }