RFR: 8303697: ProcessTools doesn't print last line of process output [v5]

[Leonid Mesnik]

> 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.

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  typo fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/13034/files
  - new: https://git.openjdk.org/jdk/pull/13034/files/47df1034..a1d7be0b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=13034&range=04
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=13034&range=03-04

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 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