RFR: 8325950: Make sure all files in the JDK pass jcheck

[Magnus Ihse Bursie]

Since jcheck only checks file in a commit, there is a possibility of us getting files in the repository that would not be accepted by jcheck. This can happen when extending the set of files checked by jcheck, or if jcheck changes how it checks files (perhaps due to bug fixes).

I have now run jcheck over the entire code base, and fixed a handful of issues. With these changes, jcheck accept the entire code base.

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Commit messages:
 - 8325950: Make sure all files in the JDK pass jcheck

Changes: https://git.openjdk.org/jdk/pull/17871/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=17871&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8325950
  Stats: 113 lines in 38 files changed: 0 ins; 10 del; 103 mod
  Patch: https://git.openjdk.org/jdk/pull/17871.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17871/head:pull/17871

PR: https://git.openjdk.org/jdk/pull/17871