7903231: Add changelog to jtreg

[sormuras]

Please review and extend this initial changelog file.

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Progress

• Change must be properly reviewed (1 review required, with at least 1 Reviewer)
• Change must not contain extraneous whitespace
• Commit message must refer to an issue

Issue

• CODETOOLS-7903231: Add changelog to jtreg

Reviewing

Using git

Checkout this PR locally:
$ git fetch https://git.openjdk.org/jtreg pull/96/head:pull/96
$ git checkout pull/96

Update a local copy of the PR:
$ git checkout pull/96
$ git pull https://git.openjdk.org/jtreg pull/96/head

Using Skara CLI tools

Checkout this PR locally:
$ git pr checkout 96

View PR using the GUI difftool:
$ git pr show -t 96

Using diff file

Download this PR as a diff file:
https://git.openjdk.org/jtreg/pull/96.diff

[bridgekeeper]

👋 Welcome back cstein! A progress list of the required criteria for merging this PR into master will be added to the body of your pull request. There are additional pull request commands available for use with this pull request.

[gerard-ziemski]

I like the idea of the changes log, however, if we were going to do this, then we would need to add a note to the README (or doc/building.md) to remind the developers to consider updating the log.

Any recommendations on how a developer should decide whether their change is log worthy?

[sormuras]

Superseded by #133