RFR: 8315652: RISC-V: Features string uses wrong separator for jtreg

Wed Sep 6 06:22:09 UTC 2023

Hi, please consider.

As described in jbs, this handles both cases with a rough solution by having two strings.
Meaning we get e.g. 'v' as a separate feature from CPUInfo, but we still get the pretty string in e.g. hs_err.

Tested tier1 on qemu rv.

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Commit messages:
 - Draft

Changes: https://git.openjdk.org/jdk/pull/15579/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15579&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315652
  Stats: 31 lines in 4 files changed: 28 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15579.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15579/head:pull/15579

PR: https://git.openjdk.org/jdk/pull/15579