[jdk11u-dev] RFR: 8248238: Implementation: JEP 388: Windows AArch64 Support

[Reka Kovacs]

Main commit of the Windows/AArch64 port.

Depends on #274 and #299.

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Commit messages:
 - Backport 9604ee82690f89320614b37bfef4178abc869777
 - Backport ec9bee68660acd6abf0b4dd4023ae69514542256
 - Backport a4eaf9536c272862b5ec856bf263679be09bddc9

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/301/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=301&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8248238
  Stats: 4025 lines in 64 files changed: 2371 ins; 276 del; 1378 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/301.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/301/head:pull/301

PR: https://git.openjdk.java.net/jdk11u-dev/pull/301