RFR: 8315652: RISC-V: Features string uses wrong separator for jtreg [v3]

[Robbin Ehn]

> 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.

Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:

  One features string

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15579/files
  - new: https://git.openjdk.org/jdk/pull/15579/files/1ca70f8f..7247c9a8

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15579&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15579&range=01-02

  Stats: 33 lines in 4 files changed: 3 ins; 27 del; 3 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