[jdk11u-dev] RFR: 8214078: SecureDirectoryStream not supported on arm32

[Joshua Cao]

Clean backport. Passes test on our arm32 machine.

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Commit messages:
 - 8214078: SecureDirectoryStream not supported on arm32

Changes: https://git.openjdk.org/jdk11u-dev/pull/1322/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u-dev&pr=1322&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8214078
  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.org/jdk11u-dev/pull/1322.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u-dev pull/1322/head:pull/1322

PR: https://git.openjdk.org/jdk11u-dev/pull/1322