[lworld] RFR: 8279656: [lworld] Javac diagnostic compiler.err.primitive.class.must.not.implement.cloneable not valid anymore

[Aggelos Biboudis]

Elides the restriction for `Cloneable`.

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Commit messages:
 - JDK-8279656: Javac diagnostic compiler.err.primitive.class.must.not.implement.cloneable not valid anymore

Changes: https://git.openjdk.java.net/valhalla/pull/603/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=603&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279656
  Stats: 45 lines in 4 files changed: 11 ins; 34 del; 0 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/603.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/603/head:pull/603

PR: https://git.openjdk.java.net/valhalla/pull/603