git: openjdk/jdk: master: 8345726: Update mx in RunTestPrebuiltSpec to reflect change in JDK-8345302

[Erik Joelsson]

Changeset: 166c1277
Branch: master
Author:    Erik Joelsson <erikj at openjdk.org>
Date:      2024-12-09 14:05:57 +0000
URL:       https://git.openjdk.org/jdk/commit/166c12771d9d8c466e73a9490c4eb1fc9a5f6c24

8345726: Update mx in RunTestPrebuiltSpec to reflect change in JDK-8345302

Reviewed-by: ihse

! make/RunTestsPrebuiltSpec.gmk