RFR: 8303697: ProcessTools doesn't print last line of process output

Wed Mar 15 05:50:17 UTC 2023

The StreamPumper is fixed to process the last line even it is not finishes with '\n' or '\r'. The test included. Testing with tier1-3 also to verify that tests are not broken.

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Commit messages:
 - fix
 - 8303697

Changes: https://git.openjdk.org/jdk/pull/13034/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=13034&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8303697
  Stats: 76 lines in 2 files changed: 72 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/13034.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/13034/head:pull/13034

PR: https://git.openjdk.org/jdk/pull/13034