[jdk16u] RFR: 8261261: The version extra fields needs to be overridable in jib-profiles.js

[Erik Joelsson]

8261261: The version extra fields needs to be overridable in jib-profiles.js

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Commit messages:
 - Applying patch from mainline

Changes: https://git.openjdk.java.net/jdk16u/pull/30/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk16u&pr=30&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8261261
  Stats: 4 lines in 1 file changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk16u/pull/30.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk16u pull/30/head:pull/30

PR: https://git.openjdk.java.net/jdk16u/pull/30