[lworld] Integrated: 8264977: [lworld] A primitive class field by name val confuses javac

[Srikanth Adayapalam]

More robust handling of .ref/.val tokens even as we wait for JDK-8244229 for the full solution

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Commit messages:
 - 8264977: A primitive class field by name val confuses javac

Changes: https://git.openjdk.java.net/valhalla/pull/380/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=380&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8264977
  Stats: 117 lines in 4 files changed: 116 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/380.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/380/head:pull/380

PR: https://git.openjdk.java.net/valhalla/pull/380