stable/21.x: [Support] Add SipHash-based 64-bit stable hash function (#160945)#11724

nate-chandler wants to merge 1 commit intoswiftlang:stable/21.xswiftlang/llvm-project:stable/21.xfrom

nate-chandler:cherrypick/stable/21.x/support-add-siphash-based-64-bit-stable-hash-functionnate-chandler/llvm-project:cherrypick/stable/21.x/support-add-siphash-based-64-bit-stable-hash-functionCopy head branch name to clipboard