[11u] RFR: 8237182: Update copyright header for shenandoah and epsilon files

[Aleksey Shipilev]

On 7/23/20 11:46 AM, Langer, Christoph wrote:
> Bug: https://bugs.openjdk.java.net/browse/JDK-8237182
> Original Change: https://hg.openjdk.java.net/jdk/jdk/rev/14c78683c9f0
> Webrev: http://cr.openjdk.java.net/~clanger/webrevs/8237182.11u.0/

This looks fine, thank you.

-- 
-Aleksey