RFR: 8263097: Update JMH devkit to 1.28

[Erik Joelsson]

On Fri, 5 Mar 2021 16:11:38 GMT, Eric Caspole <ecaspole at openjdk.org> wrote:

>> Currently at 1.26, so there are a few good improvements and a few bug fixes - notably resolving a build reproducibility issue.
>
> Good!
> Eric

Should also updated jib-profiles.js Oracle builds get the new version.

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PR: https://git.openjdk.java.net/jdk/pull/2848