[jdk17u-dev] RFR: 8229147: Linux os::create_thread() overcounts guardpage size with newer glibc (>=2.27)

[Martin Doerr]

Backport of [JDK-8229147](https://bugs.openjdk.org/browse/JDK-8229147).

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Commit messages:
 - Backport 9ebcda2165c42e3f7b82a9ae8074badb69c0d270

Changes: https://git.openjdk.org/jdk17u-dev/pull/1489/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1489&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8229147
  Stats: 86 lines in 3 files changed: 49 ins; 20 del; 17 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1489.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev.git pull/1489/head:pull/1489

PR: https://git.openjdk.org/jdk17u-dev/pull/1489