[jdk11u-dev] RFR: 8211400: nsk.share.gc.Memory::getArrayLength returns wrong value

[Paul Hohensee]

Backport for parity with Oracle 11.0.28 Clean, low risk: fixes an nsk test, nsk passes with modified test.

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Commit messages:
 - Backport 860d49db22cf352eaf1b3b20fff43d090f0eebc8

Changes: https://git.openjdk.org/jdk11u-dev/pull/3027/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=3027&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8211400
  Stats: 7 lines in 1 file changed: 0 ins; 3 del; 4 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/3027.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev.git pull/3027/head:pull/3027

PR: https://git.openjdk.org/jdk11u-dev/pull/3027