RFR: 8258836: JNI local refs exceed capacity getDiagnosticCommandInfo

[Severin Gehwolf]

This patch adds some explicit capacity for local refs. New regression test
fails prior and passes after the patch.

Thoughts?

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Commit messages:
 - 8258836: JNI local refs exceed capacity getDiagnosticCommandInfo

Changes: https://git.openjdk.java.net/jdk/pull/2130/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2130&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258836
  Stats: 127 lines in 3 files changed: 120 ins; 3 del; 4 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2130.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2130/head:pull/2130

PR: https://git.openjdk.java.net/jdk/pull/2130