[crac] RFR: Report checkpoint processing to jcmd [v25]

[Ilarion Nakonechnyy]

> pass output stream from diagnosticCommand.cpp through java code into os_linux.cpp::VM_crac::doit()

Ilarion Nakonechnyy has updated the pull request with a new target base due to a merge or a rebase.

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Changes: https://git.openjdk.org/crac/pull/10/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=10&range=24
  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/crac/pull/10.diff
  Fetch: git fetch https://git.openjdk.org/crac pull/10/head:pull/10

PR: https://git.openjdk.org/crac/pull/10