RFR: 8337265: Test static-libs build in GitHub Actions

[Doug Simon]

This PR modifies the GitHub Actions' linux product build to include building of the static-libs bundle as a minimal smoke test that these builds don't break.

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Commit messages:
 - build static-libs on linux

Changes: https://git.openjdk.org/jdk/pull/20803/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=20803&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8337265
  Stats: 12 lines in 2 files changed: 8 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/20803.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/20803/head:pull/20803

PR: https://git.openjdk.org/jdk/pull/20803