[clang] [llvm] [Hashing] Use a non-deterministic seed if LLVM_ENABLE_ABI_BREAKING_CHECKS (PR #96282)

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quic-seaswara wrote:

Aren't hashes supposed to be deterministic ? 

Can we add a override for builds with asserts turned ON to favor determinism ? 

Could have an API to set the determinism flag ?

This also has an effect on Build ID computation ?



https://github.com/llvm/llvm-project/pull/96282