git: openjdk/jdk-sandbox: shen-late-barriers: use acquire only if required

[duke]

Changeset: 3735c52a
Branch: shen-late-barriers
Author:    Cesar Soares <dcsl at amazon.com>
Date:      2025-11-15 02:28:19 +0000
URL:       https://git.openjdk.org/jdk-sandbox/commit/3735c52a3a1e0e746437a8f8b740702d45f1d97e

use acquire only if required

! src/hotspot/cpu/aarch64/gc/shenandoah/shenandoah_aarch64.ad