[jdk11u] RFR: 8236045: [TESTBUG] MismatchedWhiteBox test fails with missing WhiteBox$WhiteBoxPermission.class

[yansendao]

Reviewed-by: Yi Yang

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Commit messages:
 - 8236045: [TESTBUG] MismatchedWhiteBox test fails with missing WhiteBox$WhiteBoxPermission.class

Changes: https://git.openjdk.org/jdk11u/pull/75/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk11u&pr=75&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8236045
  Stats: 10 lines in 1 file changed: 9 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk11u/pull/75.diff
  Fetch: git fetch https://git.openjdk.org/jdk11u.git pull/75/head:pull/75

PR: https://git.openjdk.org/jdk11u/pull/75