git: openjdk/jdk21u-dev: master: 8332885: Clarify failure_handler self-tests

[Martin Doerr]

Changeset: ce34aa91
Author:    Martin Doerr <mdoerr at openjdk.org>
Date:      2024-06-05 08:34:55 +0000
URL:       https://git.openjdk.org/jdk21u-dev/commit/ce34aa9125480cafe829590ec494e9716e4d7e2d

8332885: Clarify failure_handler self-tests

Backport-of: 08891553bbd3d71337d8a94c75051db74e15903f

! make/test/BuildFailureHandler.gmk
! test/failure_handler/README