[jdk11u-dev] RFR: 8243666: ModuleHashes attribute generated for JMOD and JAR files depends on timestamps

[Christoph Langer]

Clean backport, only resolved one copyright header diff.

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Depends on: https://git.openjdk.java.net/jdk11u-dev/pull/915

Commit messages:
 - 8243666: ModuleHashes attribute generated for JMOD and JAR files depends on timestamps

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/916/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=916&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8243666
  Stats: 189 lines in 5 files changed: 129 ins; 21 del; 39 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/916.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/916/head:pull/916

PR: https://git.openjdk.java.net/jdk11u-dev/pull/916