git: openjdk/jdk: 8266857: PipedOutputStream.sink should be volatile

[Liam Miller-Cushon]

Changeset: d0daa725
Author:    Liam Miller-Cushon <cushon at openjdk.org>
Date:      2021-05-11 15:47:14 +0000
URL:       https://git.openjdk.java.net/jdk/commit/d0daa72592815fcdd9d550b9cc7dd70a06ae0968

8266857: PipedOutputStream.sink should be volatile

Reviewed-by: dfuchs

! src/java.base/share/classes/java/io/PipedOutputStream.java