RFR: JDK-8328165: improve assert(idx < _maxlrg) failed: oob

[Matthias Baesken]

The assert in chaitin.hpp
assert(idx < _maxlrg) failed: oob
could be improved, it should show more information.

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Commit messages:
 - JDK-8328165

Changes: https://git.openjdk.org/jdk/pull/18302/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18302&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328165
  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18302.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18302/head:pull/18302

PR: https://git.openjdk.org/jdk/pull/18302