hg: jdk/submit: 8220657: JFR.dump does not work when filename is set

[yasuenag at gmail.com]

Changeset: dfa85f19f1cc
Author:    ysuenaga
Date:      2019-03-15 14:31 +0900
URL:       http://hg.openjdk.java.net/jdk/submit/rev/dfa85f19f1cc

8220657: JFR.dump does not work when filename is set

! src/jdk.jfr/share/classes/jdk/jfr/internal/PlatformRecording.java
! src/jdk.jfr/share/classes/jdk/jfr/internal/dcmd/DCmdDump.java
! test/jdk/jdk/jfr/jcmd/TestJcmdDump.java