[llvm-branch-commits] [llvm] [Support] Integrate SipHash.cpp into libSupport. (PR #94394)

[Ahmed Bougacha via llvm-branch-commits]

ahmedbougacha wrote:

I'll also mention that I left the original variable naming but did re-format it, whitespace being more friendly to diffs, and this being nice and tidily contained.  If you or others have strong opinions, I'm happy to recapitalize them.

https://github.com/llvm/llvm-project/pull/94394