[jdk17] RFR: 8269614: [s390] Interpreter checks wrong bit for slow path instance allocation

[Martin Doerr]

This is a small fix for a bug in the template interpreter on s390. Klass::_lh_instance_slow_path_bit is the bit to check, not the bit position. (See other platforms.)

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Commit messages:
 - 8269614: [s390] Interpreter checks wrong bit for slow path instance allocation

Changes: https://git.openjdk.java.net/jdk17/pull/177/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=177&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269614
  Stats: 2 lines in 1 file changed: 0 ins; 1 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/177.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/177/head:pull/177

PR: https://git.openjdk.java.net/jdk17/pull/177