[jdk16u] RFR: 8260338: Some fields in HaltNode is not cloned

[Tobias Hartmann]

Backport of [JDK-8260338](https://bugs.openjdk.java.net/browse/JDK-8260338). Applies cleanly.

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Commit messages:
 - 8260338: Some fields in HaltNode is not cloned

Changes: https://git.openjdk.java.net/jdk16u/pull/15/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=15&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8260338
  Stats: 5 lines in 2 files changed: 3 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/15.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/15/head:pull/15

PR: https://git.openjdk.java.net/jdk16u/pull/15