RFR: Fix SCCache closing races

[Aleksey Shipilev]

On Wed, 4 Sep 2024 21:38:51 GMT, Vladimir Kozlov <kvn at openjdk.org> wrote:

> Please, use [premain] prefix in subjects which we use in JBS for our bugs. And Ioi filed SKARA request to automatically send our PR requests to Leyden-dev mailing list because I missed this PR.

Thanks! I see we do not prefix commit messages with `[premain]` when they do not have the associated JBS entries. So I'll skip this one, and see if we can integrated without JBS entry.

-------------

PR Comment: https://git.openjdk.org/leyden/pull/13#issuecomment-2330998299