RFR: JDK-8259539: JDK-8255711 broke trap messages

[Thomas Stuefe]

SIGTRAP/SIGILL are used on ppc/aarch64 to implement traps in compiled code (print a trap message and stop with a fatal error).

JDK-8255711 reworked and unified that coding. Calls down into VMError::report_and_die() had been factored out of platform dependent code. Since that change, traps are handled the same as normal crashes, so we loose the detail message associated with a trap. This functionality should be restored.

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Commit messages:
 - JDK-8259539-restore-trap-messages

Changes: https://git.openjdk.java.net/jdk/pull/2022/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=2022&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8259539
  Stats: 24 lines in 3 files changed: 22 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/2022.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/2022/head:pull/2022

PR: https://git.openjdk.java.net/jdk/pull/2022