hg: jdk/jdk: 8227442: Make young_index_in_cset zero-based

[thomas.schatzl at oracle.com]

Changeset: 854e828d6b5b
Author:    tschatzl
Date:      2019-08-20 09:22 +0200
URL:       https://hg.openjdk.java.net/jdk/jdk/rev/854e828d6b5b

8227442: Make young_index_in_cset zero-based
Summary: Avoid unnecessary increment of young_index_in_cset in copy_to_survivor_space.
Reviewed-by: kbarrett, sangheki

! src/hotspot/share/gc/g1/g1CollectedHeap.cpp
! src/hotspot/share/gc/g1/g1CollectionSet.cpp
! src/hotspot/share/gc/g1/g1ParScanThreadState.cpp
! src/hotspot/share/gc/g1/g1ParScanThreadState.hpp
! src/hotspot/share/gc/g1/heapRegion.cpp
! src/hotspot/share/gc/g1/heapRegion.hpp