[lilliput-jdk21u:lilliput] RFR: 8319135: [Lilliput] Fix objArrayOop gtest

[Roman Kennke]

Hi all,

This pull request contains a backport of commit [fc9020fb](https://github.com/openjdk/lilliput/commit/fc9020fbf193b1c6d2b2fb5d80192c3082dbcf2e) from the [openjdk/lilliput](https://git.openjdk.org/lilliput) repository.

The commit being backported was authored by Roman Kennke on 1 Nov 2023 and was reviewed by Aleksey Shipilev.

Thanks!

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Commit messages:
 - Backport fc9020fbf193b1c6d2b2fb5d80192c3082dbcf2e

Changes: https://git.openjdk.org/lilliput-jdk21u/pull/12/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput-jdk21u&pr=12&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8319135
  Stats: 29 lines in 1 file changed: 12 ins; 0 del; 17 mod
  Patch: https://git.openjdk.org/lilliput-jdk21u/pull/12.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk21u.git pull/12/head:pull/12

PR: https://git.openjdk.org/lilliput-jdk21u/pull/12