[lworld] Integrated: 8355295: [lworld] runtime/valhalla/inlinetypes/VolatileTest.java fails with -XX:+UseAtomicValueFlattening

[Frederic Parain]

Update test after the semantic change of the volatile keyword (it's now a flattening opt-out again).

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Commit messages:
 - Update test after volatile semantic change (flattening opt-out)

Changes: https://git.openjdk.org/valhalla/pull/1440/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1440&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8355295
  Stats: 8 lines in 1 file changed: 0 ins; 7 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1440.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1440/head:pull/1440

PR: https://git.openjdk.org/valhalla/pull/1440