[compiler-rt] [Profile][Windows] Fix flakyness when checking existence of binary id (PR #84196)

[via llvm-commits]

https://github.com/zmodem approved this pull request.

lgtm with nit

Can a build-id be all-zeros? If yes, maybe as a followup we should ensure that it can't.

https://github.com/llvm/llvm-project/pull/84196