[jdk17u-dev] RFR: 8293493: Signal Handlers printout should show signal block state

[Thomas Stuefe]

Small trivial downport for a useful analysis feature.

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Commit messages:
 - Merge branch 'openjdk:master' into tstuefe-backport-d14e96d9
 - Backport d14e96d9701dae951aa365029f58afb6687a646a

Changes: https://git.openjdk.org/jdk17u-dev/pull/1060/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1060&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8293493
  Stats: 6 lines in 1 file changed: 5 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1060.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/1060/head:pull/1060

PR: https://git.openjdk.org/jdk17u-dev/pull/1060