hg: jdk/sandbox: Merge

[patrick.concannon at oracle.com]

Changeset: bc543a620020
Author:    pconcannon
Date:      2020-01-13 15:16 +0000
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/bc543a620020

Merge

- src/hotspot/share/runtime/flags/jvmFlagWriteableList.cpp
- src/hotspot/share/runtime/flags/jvmFlagWriteableList.hpp
- test/jdk/jdk/jfr/api/consumer/recordingstream/TestSetFlushInterval.java
- test/jdk/jdk/jfr/api/recording/time/TestSetFlushInterval.java