RFR: 8299683: [S390X] Problems with -XX:+VerifyStack

[sid8606]

Deoptimization and uncommon trap stubs require last Java PC to point to a PC which has an appropriate OopMap. Adjusting a offset for PC in last java frame.

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Commit messages:
 - 8299683: [s390] Problems with -XX:+VerifyStack

Changes: https://git.openjdk.org/jdk/pull/12161/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12161&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8299683
  Stats: 8 lines in 1 file changed: 3 ins; 2 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/12161.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12161/head:pull/12161

PR: https://git.openjdk.org/jdk/pull/12161