hg: loom/loom: Enable walk_cont flag for some stack walking.

[chris.plummer at oracle.com]

Changeset: bf00c736e8d5
Author:    cjplummer
Date:      2019-06-14 15:09 -0700
URL:       http://hg.openjdk.java.net/loom/loom/rev/bf00c736e8d5

Enable walk_cont flag for some stack walking.

! src/hotspot/share/prims/jvmtiEnvBase.cpp
! src/hotspot/share/prims/jvmtiEventController.cpp
! src/hotspot/share/prims/jvmtiThreadState.cpp