RFR: 8258838: Remove JVM option UseStackBanging

[Harold Seigel]

Please review this change to remove the JVM develop flag UseStackBanging and always use stack banging.

The change was tested with tiers 1-2 on Linux, Mac OS, and Windows, tiers 3-5 on Linux x64, and cross-builds on PPC64, Linux32, and S390x.

Thanks, Harold

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Commit messages:
 - 8258838: Remove JVM option UseStackBanging

Changes: https://git.openjdk.java.net/jdk/pull/1988/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=1988&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8258838
  Stats: 213 lines in 19 files changed: 0 ins; 55 del; 158 mod
  Patch: https://git.openjdk.java.net/jdk/pull/1988.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/1988/head:pull/1988

PR: https://git.openjdk.java.net/jdk/pull/1988