RFR: 8328948: GHA: Restoring sysroot from cache skips the build after JDK-8326960

[Aleksey Shipilev]

When doing [JDK-8326960](https://bugs.openjdk.org/browse/JDK-8326960), I missed the case when sysroot would be restored from the cache. This would skip the configure and build steps, because it would only consult the status for create-sysroot job. This is only a problem when PR gets tested the _second_ time, the first time we would always create a sysroot. I only noticed this after merging the master into existing PRs.

This is a regression that might hide build issues on platforms, and so it should be fixed ASAP.

Additional testing:
 - [x] GHA first run: cross-compiled builds run
 - [x] GHA second run: cross-compiled builds run

-------------

Commit messages:
 - Empty commit to trigger second GHA run
 - Fix

Changes: https://git.openjdk.org/jdk/pull/18475/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=18475&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8328948
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/18475.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18475/head:pull/18475

PR: https://git.openjdk.org/jdk/pull/18475