RFR: 8271855: [TESTBUG] Wrong weakCompareAndSet assumption in UnsafeIntrinsicsTest [v2]

[Martin Doerr]

> We need a fix for test failures due to wrong assumption. (See JBS issue for details.) I suggest to give weakCompareAndSet several chances.

Martin Doerr has updated the pull request incrementally with one additional commit since the last revision:

  Retrying 4 times is probably an overkill.

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Changes:
  - all: https://git.openjdk.java.net/jdk/pull/4992/files
  - new: https://git.openjdk.java.net/jdk/pull/4992/files/f39bb85a..f0a13417

Webrevs:
 - full: https://webrevs.openjdk.java.net/?repo=jdk&pr=4992&range=01
 - incr: https://webrevs.openjdk.java.net/?repo=jdk&pr=4992&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk/pull/4992.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/4992/head:pull/4992

PR: https://git.openjdk.java.net/jdk/pull/4992