RFR: 8301123: Enable Symbol refcounting underflow checks in PRODUCT

Thu Jan 26 13:30:56 UTC 2023

Enabling refcounting underflow detection in product would have helped with debugging [JDK-8278965](https://bugs.openjdk.org/browse/JDK-8278965).  We'd rather have this assert for customers than the subsequent memory corruption.
Tested with tier1-4, 7, 8 with linux-x64 product.

-------------

Commit messages:
 - 8301123: Enable Symbol refcounting underflow checks in PRODUCT

Changes: https://git.openjdk.org/jdk/pull/12218/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12218&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301123
  Stats: 14 lines in 2 files changed: 7 ins; 6 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/12218.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12218/head:pull/12218

PR: https://git.openjdk.org/jdk/pull/12218