hg: shenandoah/jdk: AArch64: Don't generate CAS barrier when -XX:-ShenandoahCASBarrier

[roman at kennke.org]

Changeset: 2e332acde956
Author:    rkennke
Date:      2018-09-10 17:42 -0400
URL:       http://hg.openjdk.java.net/shenandoah/jdk/rev/2e332acde956

AArch64: Don't generate CAS barrier when -XX:-ShenandoahCASBarrier

! src/hotspot/cpu/aarch64/gc/shenandoah/shenandoahBarrierSetAssembler_aarch64.cpp