git: openjdk/jdk: 8323170: j2dbench is using outdated javac source/target to be able to build by itself

[Phil Race]

Changeset: b5df2f43
Author:    Jiří Vaněk <jvanek at openjdk.org>
Committer: Phil Race <prr at openjdk.org>
Date:      2024-02-16 22:16:58 +0000
URL:       https://git.openjdk.org/jdk/commit/b5df2f43147535b4d22c6451e3a65170159f76b7

8323170: j2dbench is using outdated javac source/target to be able to build by itself

Reviewed-by: serb

! src/demo/share/java2d/J2DBench/Makefile
! src/demo/share/java2d/J2DBench/README
! src/demo/share/java2d/J2DBench/build.xml