hg: jdk/jdk: 8218935: Make jfr strncpy uses GCC 8.x friendly

[mikael.vidstedt at oracle.com]

Changeset: 65deccd64f3a
Author:    mikael
Date:      2019-02-14 15:17 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/65deccd64f3a

8218935: Make jfr strncpy uses GCC 8.x friendly
Reviewed-by: clanger

! src/hotspot/share/jfr/recorder/checkpoint/types/jfrThreadGroup.cpp
! src/hotspot/share/jfr/recorder/repository/jfrChunkState.cpp
! src/hotspot/share/jfr/recorder/repository/jfrRepository.cpp