RFR: 8293224 Add link to openjdk.org/jtreg/ from doc/testing

Thu Sep 1 16:24:43 UTC 2022

doc/testing is a starting point for people interested in testing the JDK, but it doesn't explain jtreg and its nuances and pitfalls very well. https://openjdk.org/jtreg/, and expecially https://openjdk.org/jtreg/faq.html, contain better material. Let's at least add a pointer that will bring people there.

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Commit messages:
 - Link to openjdk.org/jtreg/ from doc/testing

Changes: https://git.openjdk.org/jdk/pull/10122/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=10122&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293224
  Stats: 4 lines in 2 files changed: 2 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/10122.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/10122/head:pull/10122

PR: https://git.openjdk.org/jdk/pull/10122