[lilliput-jdk17u:lilliput] RFR: 8321135: [Lilliput/JDK17] Fix repo permissions

[Roman Kennke]

The Lilliput/JDK17u repo has the wrong permissons: it inherits permissions from jdk-updates, but should use permission from she Shenandoah project instead.

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Commit messages:
 - 8321135: [Lilliput/JDK17] Fix repo permissions

Changes: https://git.openjdk.org/lilliput-jdk17u/pull/67/files
 Webrev: https://webrevs.openjdk.org/?repo=lilliput-jdk17u&pr=67&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8321135
  Stats: 3 lines in 1 file changed: 0 ins; 0 del; 3 mod
  Patch: https://git.openjdk.org/lilliput-jdk17u/pull/67.diff
  Fetch: git fetch https://git.openjdk.org/lilliput-jdk17u.git pull/67/head:pull/67

PR: https://git.openjdk.org/lilliput-jdk17u/pull/67