hg: jdk/jdk12: 2 new changesets

[dean.long at oracle.com]

Changeset: 2f41e4935c34
Author:    dlong
Date:      2018-12-18 12:36 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk12/rev/2f41e4935c34

8215205: javaVFrame much slower than vframeStream
Reviewed-by: mchung, thartmann

! src/hotspot/share/code/scopeDesc.cpp
! src/hotspot/share/code/scopeDesc.hpp
! src/hotspot/share/runtime/vframe.cpp
! src/hotspot/share/runtime/vframe.hpp
! src/hotspot/share/runtime/vframe.inline.hpp
! src/hotspot/share/runtime/vframe_hp.cpp
! src/hotspot/share/runtime/vframe_hp.hpp

Changeset: a7bd89486175
Author:    dlong
Date:      2018-12-18 12:45 -0800
URL:       http://hg.openjdk.java.net/jdk/jdk12/rev/a7bd89486175

8214329: SwingMark SubMenus 9% regression in 12-b19 on Linux client
Reviewed-by: thartmann, mullan

! src/hotspot/share/prims/jvm.cpp