RFR: CODETOOLS-7902834: JMHSample_25_API_GA selectToBreed selection bug

[Aleksey Shipilev]

SonarCloud instance reports: 'Was "-=" meant instead?'

            double thresh = Math.random() * totalScore;
            for (Chromosome c : list) {
                if (thresh < 0) return c;
                thresh =- c.score(); // <--- here
            }

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Commit messages:
 - CODETOOLS-7902834: JMHSample_25_API_GA selectToBreed selection bug

Changes: https://git.openjdk.java.net/jmh/pull/28/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jmh&pr=28&range=00
  Issue: https://bugs.openjdk.java.net/browse/CODETOOLS-7902834
  Stats: 7 lines in 1 file changed: 4 ins; 0 del; 3 mod
  Patch: https://git.openjdk.java.net/jmh/pull/28.diff
  Fetch: git fetch https://git.openjdk.java.net/jmh pull/28/head:pull/28

PR: https://git.openjdk.java.net/jmh/pull/28