[jdk11u-dev] RFR: 8274773: [TESTBUG] UnsafeIntrinsicsTest intermittently fails on weak memory model platform

[Martin Doerr]

Backport of JDK-8274773.

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Commit messages:
 - Backport 49f8ce6e9c797cd11ea586e3cf87398888bc8cf1

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/650/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=650&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274773
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/650.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/650/head:pull/650

PR: https://git.openjdk.java.net/jdk11u-dev/pull/650