hg: jdk-updates/jdk11u-dev: 8227368: EnumSet.class serialization broken in JDK 9+

[stuart.marks at oracle.com]

Changeset: 81e528c07560
Author:    smarks
Date:      2019-09-11 17:15 -0700
URL:       https://hg.openjdk.java.net/jdk-updates/jdk11u-dev/rev/81e528c07560

8227368: EnumSet.class serialization broken in JDK 9+
Reviewed-by: plevart, clanger

! src/java.base/share/classes/java/util/EnumSet.java
! test/jdk/java/util/EnumSet/BogusEnumSet.java
+ test/jdk/java/util/EnumSet/EnumSetClassSerialization.java