hg: jdk/jdk: 8166253: (ch) FileLock object can get GC'd and result in unexpected release of file lock

[brian.burkhalter at oracle.com]

Changeset: cdd3239a2a61
Author:    bpb
Date:      2018-02-02 13:44 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/cdd3239a2a61

8166253: (ch) FileLock object can get GC'd and result in unexpected release of file lock
Reviewed-by: alanb, dfuchs, mli, rriggs

! src/java.base/share/classes/sun/nio/ch/FileLockTable.java
+ test/jdk/java/nio/channels/FileLock/FileLockGC.java