RFR: 8255393: sun/security/util/DerValue/Indefinite.java fails with ---illegal-access=deny

[Weijun Wang]

The test calls Field::setAccessible and needs an "open" access to the internal class.

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Commit messages:
 - 8255393: sun/security/util/DerValue/Indefinite.java fails with ---illegal-access=deny

Changes: https://git.openjdk.java.net/jdk/pull/864/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=864&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8255393
  Stats: 3 lines in 1 file changed: 0 ins; 1 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/864.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/864/head:pull/864

PR: https://git.openjdk.java.net/jdk/pull/864