[jdk22u] RFR: 8328948: GHA: Restoring sysroot from cache skips the build after JDK-8326960 [v2]

[Aleksey Shipilev]

> Fixes a recent GHA regression.
> 
> Additional testing:
>  - [x] GHA, first run passes cross-builds
>  - [ ] GHA, second run passes cross-builds

Aleksey Shipilev has updated the pull request incrementally with one additional commit since the last revision:

  Empty commit to trigger second GHA run

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

Changes:
  - all: https://git.openjdk.org/jdk22u/pull/115/files
  - new: https://git.openjdk.org/jdk22u/pull/115/files/c977d7c4..ccc5ac25

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk22u&pr=115&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk22u&pr=115&range=00-01

  Stats: 0 lines in 0 files changed: 0 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk22u/pull/115.diff
  Fetch: git fetch https://git.openjdk.org/jdk22u.git pull/115/head:pull/115

PR: https://git.openjdk.org/jdk22u/pull/115