Log Message:
xxhash: update to 0.8.2.

v0.8.2
- fix  : XXH3 S390x vector implementation (@hzhuang1)
- fix  : PowerPC vector compilation with IBM XL compiler (@MaxiBoether)
- perf : improved WASM speed by x2/x3 using SIMD128 (@easyaspi314)
- perf : improved speed (+20%) for XXH3 on ARM NEON (@easyaspi314)
- cli  : Fix filename contain /LF character (@t-mat)
- cli  : Support # comment lines in --check files (@t-mat)
- cli  : Support commands --binary and --ignore-missing (@t-mat)
- build: fix -Og compilation (@easyaspi314, @t-mat)
- build: fix pkgconfig generation with cmake (@ilya-fedin)
- build: fix icc compilation
- build: fix cmake install directories
- build: new build options XXH_NO_XXH3, XXH_SIZE_OPT and XXH_NO_STREAM to reduce \ 
binary size (@easyaspi314)
- build: dedicated install targets (@ffontaine)
- build: support DISPATCH mode in cmake (@hzhuang1)
- portability: fix x86dispatch when building with Visual + clang-cl (@t-mat)
- portability: SVE vector implementation of XXH3 (@hzhuang1)
- portability: compatibility with freestanding environments, using XXH_NO_STDLIB
- portability: can build on Haiku (@Begasus)
- portability: validated on m68k and risc-v
- doc  : XXH3 specification (@Adrien1018)
- doc  : improved doxygen documentation (@easyaspi314, @t-mat)
- misc : dedicated sanity test binary (@t-mat)