Integrated: 8254292: Update JMH devkit to 1.26

[Aleksey Shipilev]

On Fri, 9 Oct 2020 12:30:35 GMT, Aleksey Shipilev <shade at openjdk.org> wrote:

> It is currently at 1.21, and thus misses a bunch of fixes and improvements.
> 
> Testing:
>   - [x] Creating the JMH devkit
>   - [x] Using a new devkit with `make test TEST=micro:RecordDeserialization`

This pull request has now been integrated.

Changeset: 6d2c1a66
Author:    Aleksey Shipilev <shade at openjdk.org>
URL:       https://git.openjdk.java.net/jdk/commit/6d2c1a66
Stats:     1 line in 1 file changed: 0 ins; 0 del; 1 mod

8254292: Update JMH devkit to 1.26

Reviewed-by: erikj, aph

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PR: https://git.openjdk.java.net/jdk/pull/575