RFR(trivial): JDK-8221763: Build fails when using --with-jvm-features=-g1gc, -jfr, -shenandoahgc

[Kim Barrett]

> On Apr 1, 2019, at 12:38 PM, Ao Qi <aoqi at loongson.cn> wrote:
> 
> Hi,
> 
> Build is broken when configure with
> --with-jvm-features=-g1gc,-jfr,-shenandoahgc, since
> gc/shared/softRefPolicy.hpp is missed.
> 
> Could you please review this trivial patch?
> 
> Bug:
> https://bugs.openjdk.java.net/browse/JDK-8221763
> 
> Webrev:
> http://cr.openjdk.java.net/~aoqi/8221763/webrev.00
> 
> Tested:
> linux-x86_64-{server, minimal, zero}-{fastdebug, release} build,
> linux-x86_64-{server, minimal, zero}-{fastdebug, release} build
> (configure with -g1gc,-jfr,-shenandoahgc), linux-x86_64-server-release
> hotspot:tier1_gc
> 
> Thanks,
> Ao Qi

Looks good, and trivial.