[crac] RFR: Report checkpoint processing to jcmd [v14]

[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 two additional commits since the last revision:

 - corrections
 - corrections

-------------

Changes:
  - all: https://git.openjdk.org/crac/pull/10/files
  - new: https://git.openjdk.org/crac/pull/10/files/59028cb0..918f4825

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=10&range=13
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=10&range=12-13

  Stats: 12 lines in 4 files changed: 2 ins; 3 del; 7 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