hg: jdk-updates/jdk12u: 8220344: Build failures when using --with-jvm-features=-g1gc, -jfr

[zgu at redhat.com]

Changeset: de802a143072
Author:    zgu
Date:      2019-03-12 09:59 -0400
URL:       http://hg.openjdk.java.net/jdk-updates/jdk12u/rev/de802a143072

8220344: Build failures when using --with-jvm-features=-g1gc,-jfr
Reviewed-by: tschatzl, zgu
Contributed-by: Ao Qi <aoqi at loongson.cn>

! src/hotspot/share/gc/shenandoah/shenandoahBarrierSet.cpp
! src/hotspot/share/jvmci/vmStructs_jvmci.cpp