[lworld] Integrated: 8269792: [lworld] Duplicate/redundant CONSTANT_Class_info entry in constant pool

[Srikanth Adayapalam]

Do not emit distinct Constant_class_info entries for Foo.ref and Foo.val

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Commit messages:
 - 8269792: Duplicate/redundant CONSTANT_Class_info entry in constant pool

Changes: https://git.openjdk.java.net/valhalla/pull/471/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=471&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269792
  Stats: 14 lines in 3 files changed: 7 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/471.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/471/head:pull/471

PR: https://git.openjdk.java.net/valhalla/pull/471