RFR: 8266923: [JVMCI] expose StackOverflow::_stack_overflow_limit to JVMCI

[Doug Simon]

This PR exposes the `StackOverflow::_stack_overflow_limit` field to JVMCI Java code for use in Graal.

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Commit messages:
 - expose StackOverflow::_stack_overflow_limit to JVMCI

Changes: https://git.openjdk.java.net/jdk/pull/3982/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3982&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266923
  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3982.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3982/head:pull/3982

PR: https://git.openjdk.java.net/jdk/pull/3982