[jdk17u-dev] RFR: 8287897: Augment src/jdk.internal.le/share/legal/jline.md with information on 4th party dependencies

[Goetz Lindenmaier]

Clean backport of license text.

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Commit messages:
 - Backport bc28baeba9360991e9b7575e1fbe178d873ccfc1

Changes: https://git.openjdk.org/jdk17u-dev/pull/1312/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1312&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8287897
  Stats: 253 lines in 1 file changed: 253 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1312.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1312/head:pull/1312

PR: https://git.openjdk.org/jdk17u-dev/pull/1312