[jdk17u-dev] RFR: 8301050: Detect Xen Virtualization on Linux aarch64

[Matthias Baesken]

Backport of 8301050

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Commit messages:
 - Backport 11804b246e8643a3465b9549794ccfb24ccd8fc5

Changes: https://git.openjdk.org/jdk17u-dev/pull/1174/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk17u-dev&pr=1174&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301050
  Stats: 30 lines in 2 files changed: 17 ins; 2 del; 11 mod
  Patch: https://git.openjdk.org/jdk17u-dev/pull/1174.diff
  Fetch: git fetch https://git.openjdk.org/jdk17u-dev pull/1174/head:pull/1174

PR: https://git.openjdk.org/jdk17u-dev/pull/1174