RFR: 8293532: Use lighter jmod compression levels in build config [v3]

[Aleksey Shipilev]

On Tue, 20 Sep 2022 20:53:32 GMT, Magnus Ihse Bursie <ihse at openjdk.org> wrote:

> Ship it! :)

Aye, Capt'n!

Any more opinions on this, or we are done?

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PR: https://git.openjdk.org/jdk/pull/10214