[jdk11u-dev] RFR: 8223400: Replace some enums with static const members in hotspot/runtime

[Zhengyu Gu]

A clean backport for parity with Oracle 11.0.15.

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Commit messages:
 - Backport 41bd7c5e7628e4bc805ce3a576b79f785e0ab6c3

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/641/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=641&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8223400
  Stats: 14 lines in 2 files changed: 0 ins; 2 del; 12 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/641.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/641/head:pull/641

PR: https://git.openjdk.java.net/jdk11u-dev/pull/641