[jdk11u-dev] RFR: 8279924: [PPC64, s390] implement frame::is_interpreted_frame_valid checks

[Martin Doerr]

Backport of JDK-8279924. Applies cleanly except Copyright update.

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Commit messages:
 - Backport c809d34f9ec0d8e9f77adc73ee772ce90efbe58d

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/796/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=796&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8279924
  Stats: 104 lines in 2 files changed: 96 ins; 2 del; 6 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/796.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/796/head:pull/796

PR: https://git.openjdk.java.net/jdk11u-dev/pull/796