hg: shenandoah/jdk: Cherry-pick: 8227637: Adjust Shenandoah C2 verifier to recognize IN_NATIVE barriers

[rkennke at redhat.com]

Changeset: 5d7914206774
Author:    rkennke
Date:      2019-07-15 12:31 +0200
URL:       https://hg.openjdk.java.net/shenandoah/jdk/rev/5d7914206774

Cherry-pick: 8227637: Adjust Shenandoah C2 verifier to recognize IN_NATIVE barriers
Reviewed-by: roland

! src/hotspot/share/gc/shenandoah/c2/shenandoahSupport.cpp