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

[via llvm-commits]

zmodem wrote:

> which is almost impossible to be all 0s.

It may be unlikely, but it sounds like it's definitely possible.
If all-zero build-ids are not supported, maybe that code should do something like `if (hash == 0) ++hash;`

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