RFR: 8313438: [s390x] build broken after JDK-8301996 [v2]

[Amit Kumar]

> Build Fix after JDK-8301996. 
> 
> Warnings related to new Lightweight locking scheme are seen during the build phase, but we will get rid of them, after integrating #14414 . Testing done for `release-vm`, `slowdebug-vm`, `fastdebug-vm` and `optimized-vm`.
> 
> 3 Test failures seen on s390x are un-related to these changes.
> 
> jdk/jshell/ClassMembersTest.java
> java/lang/invoke/condy/CondyWrongType.java
> java/lang/invoke/condy/CondyWithGarbageTest.java

Amit Kumar has updated the pull request with a new target base due to a merge or a rebase. The pull request now contains one commit:

  s390 Invoke Field Port

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Changes: https://git.openjdk.org/jdk/pull/15885/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15885&range=01
  Stats: 487 lines in 3 files changed: 221 ins; 72 del; 194 mod
  Patch: https://git.openjdk.org/jdk/pull/15885.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15885/head:pull/15885

PR: https://git.openjdk.org/jdk/pull/15885