[jdk11u-dev] RFR: 8276854: Windows GHA builds fail due to broken Cygwin

[Aleksey Shipilev]

Unclean backport to unbreak Windows GHA runs. The uncleanliness comes from the fact Windows AArch64 had not been integrated in 11u yet, so the related config is not present in workflow.

Additional testing:
 - [ ] Windows GHA runs are fine (see "Checks" tab)

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Commit messages:
 - Backport 403f3185f0988dcf6ef4e857d6659533bfa2943f

Changes: https://git.openjdk.java.net/jdk11u-dev/pull/609/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk11u-dev&pr=609&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8276854
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk11u-dev/pull/609.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk11u-dev pull/609/head:pull/609

PR: https://git.openjdk.java.net/jdk11u-dev/pull/609