git: openjdk/jdk17u-dev: 8287671: Adjust ForceGC to invoke System::gc fewer times for negative case

[Goetz Lindenmaier]

Changeset: 943ee59c
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2023-10-10 18:22:17 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/943ee59cf7f99b91c076d025b45a75222819267a

8287671: Adjust ForceGC to invoke System::gc fewer times for negative case
8287867: Bad merge of jdk/test/lib/util/ForceGC.java causing test compilation error

Backport-of: 2e332c276052554540da0998316a5a99bc350cd6

! test/lib/jdk/test/lib/util/ForceGC.java