git: openjdk/jdk13u-dev: 8242480: Negative value may be returned by getFreeSwapSpaceSize() in the docker

[Yuri Nesterenko]

Changeset: 021a35e3
Author:    Ekaterina Vergizova <evergizova at openjdk.org>
Committer: Yuri Nesterenko <yan at openjdk.org>
Date:      2020-12-04 07:49:26 +0000
URL:       https://git.openjdk.java.net/jdk13u-dev/commit/021a35e3

8242480: Negative value may be returned by getFreeSwapSpaceSize() in the docker

Backport-of: f6f97ea24b60a20cd3a613928840fdb5d7bd63e0

! src/jdk.management/unix/classes/com/sun/management/internal/OperatingSystemImpl.java
+ test/jdk/jdk/internal/platform/docker/GetFreeSwapSpaceSize.java
+ test/jdk/jdk/internal/platform/docker/TestGetFreeSwapSpaceSize.java