[crac] RFR: Report checkpoint processing to jcmd [v27]

[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 incrementally with one additional commit since the last revision:

  Print exceptions to tty if jcmd reporting is 'completed'

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Changes:
  - all: https://git.openjdk.org/crac/pull/10/files
  - new: https://git.openjdk.org/crac/pull/10/files/72b8cdb2..29365804

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=10&range=26
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=10&range=25-26

  Stats: 13 lines in 3 files changed: 9 ins; 0 del; 4 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