[jdk11u-dev] RFR: 8249097: test/lib/jdk/test/lib/util/JarBuilder.java has a bad copyright

[Andrew Lu]

I backport this for parity with 11.0.25-oracle.

As [JDK-8211974](https://bugs.openjdk.org/browse/JDK-8211974) is not backported, so fix the origin flie

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Commit messages:
 - Backport 9f0bafe6adc50735b49c48054bc059d13168cdc2

Changes: https://git.openjdk.org/jdk11u-dev/pull/2855/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=2855&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8249097
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/2855.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/2855/head:pull/2855

PR: https://git.openjdk.org/jdk11u-dev/pull/2855