[jdk26u] RFR: 8378218: MSYS2 reports cygwin triplet causing bash configure failure

[Daishi Tabata]

Hi all,

This pull request contains a backport of commit [feecb042](https://github.com/openjdk/jdk/commit/feecb042fe4abbb9bb3aa9324de4e40393e03ae1) from the [openjdk/jdk](https://git.openjdk.org/jdk) repository.

The commit being backported was authored by Daishi Tabata on 20 Feb 2026 and was reviewed by Erik Joelsson.

Thanks!

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Commit messages:
 - run GHA
 - update copyright
 - Backport feecb042fe4abbb9bb3aa9324de4e40393e03ae1

Changes: https://git.openjdk.org/jdk26u/pull/74/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk26u&pr=74&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8378218
  Stats: 7 lines in 1 file changed: 6 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk26u/pull/74.diff
  Fetch: git fetch https://git.openjdk.org/jdk26u.git pull/74/head:pull/74

PR: https://git.openjdk.org/jdk26u/pull/74