[jdk13u-dev] RFR: 8230307: ZGC: Make zGlobals and zArguments OS agnostic

[Sergey Nazarkin]

Clean backport as prerequisite for JDK-8216557. Tested with tier1

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Commit messages:
 - New files added
 - Backport 277ef756c4d2250047af05b3f13d8c86fe611ed4

Changes: https://git.openjdk.java.net/jdk13u-dev/pull/280/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk13u-dev&pr=280&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8230307
  Stats: 7 lines in 7 files changed: 0 ins; 0 del; 7 mod
  Patch: https://git.openjdk.java.net/jdk13u-dev/pull/280.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk13u-dev pull/280/head:pull/280

PR: https://git.openjdk.java.net/jdk13u-dev/pull/280