RFR: 8246677: LinkedTransferQueue and SynchronousQueue synchronization updates

[Martin Buchholz]

8246677: LinkedTransferQueue and SynchronousQueue synchronization updates

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Commit messages:
 - JDK-8246677

Changes: https://git.openjdk.java.net/jdk/pull/1645/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1645&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8246677
  Stats: 538 lines in 3 files changed: 143 ins; 294 del; 101 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1645.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1645/head:pull/1645

PR: https://git.openjdk.java.net/jdk/pull/1645