[8u-dev] Request for Approval: 8081219: hs_err improvement: Add event logging for class redefinition to the hs_err file

[Poonam Bajaj Parhar]

Hello,

Please approve this backport to 8u-dev. Patch applies cleanly:

Bug: https://bugs.openjdk.java.net/browse/JDK-8081219
9 changeset: http://hg.openjdk.java.net/jdk9/jdk9/hotspot/rev/918d124e7e39
9 review: 
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2015-June/014925.html
8u review: 
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2017-February/022574.html

Thanks,
Poonam