[lworld] Integrated: 8287770: [lw4] Javac tolerates synchronizing on an instance of a value interface

[Srikanth Adayapalam]

Reject synchronization attempt on any value type instance

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Commit messages:
 - 8287770: [lw4] Javac tolerates synchronizing on an instance of a value interface

Changes: https://git.openjdk.java.net/valhalla/pull/703/files
 Webrev: https://webrevs.openjdk.java.net/?repo=valhalla&pr=703&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8287770
  Stats: 18 lines in 3 files changed: 16 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/valhalla/pull/703.diff
  Fetch: git fetch https://git.openjdk.java.net/valhalla pull/703/head:pull/703

PR: https://git.openjdk.java.net/valhalla/pull/703