hg: jdk8u/jdk8u/hotspot: 2 new changesets

[gnu.andrew at redhat.com]

Changeset: 628176d22495
Author:    zgu
Date:      2019-09-12 15:15 -0400
URL:       https://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/628176d22495

8178870: instrumentation.retransformClasses cause coredump
Summary: Don't double-free cached class bytes on redefinition loading failure.
Reviewed-by: sspitsyn, jiangli

! src/share/vm/prims/jvmtiRedefineClasses.cpp
+ test/runtime/RedefineTests/RedefineDoubleDelete.java
+ test/runtime/RedefineTests/libRedefineDoubleDelete.c
+ test/runtime/RedefineTests/test8178870.sh

Changeset: fea2c7f50ce8
Author:    zgu
Date:      2019-09-12 15:29 -0400
URL:       https://hg.openjdk.java.net/jdk8u/jdk8u/hotspot/rev/fea2c7f50ce8

8217676: Upgrade libpng to 1.6.37
Reviewed-by: prr, jdv, kcr

! THIRD_PARTY_README