xxHash 0.8.2 -- xxhash.h, single-header library, unmodified.
Copyright (C) 2012-2021 Yann Collet. BSD 2-Clause License (text at the top of xxhash.h).
Upstream: https://github.com/Cyan4973/xxHash (tag v0.8.2).

Used by libs/video/rsx_texrepl.c (host-side texture replacement): the replacement key is
XXH3_64bits_withSeed over the guest texture bytes, which offline pack tools compute with any
xxHash >= 0.8.0 binding (e.g. the PyPI "xxhash" package: xxhash.xxh3_64_intdigest(data, seed)).
XXH3's output is frozen since 0.8.0.
