Update 'xxHash' to v0.8.2 #1079

Job	Run time
set_matrix	4s
xxHash clang-cxx17 ubuntu-20.04	44s
xxHash gcc-7-cxx17 ubuntu-20.04	43s
xxHash gcc-8-cxx17-fpic ubuntu-20.04	46s
xxHash gcc-9-cxx17-fpic ubuntu-20.04	53s
xxHash android-ndk-r17-api-24-arm64-v8a-clang-libcxx14 ubuntu-20.04	1m 20s
xxHash analyze-cxx17 ubuntu-20.04	37s
xxHash sanitize-address-cxx17 ubuntu-20.04	44s
xxHash sanitize-leak-cxx17 ubuntu-20.04	43s
xxHash sanitize-thread-cxx17 ubuntu-20.04	46s
xxHash osx-12-3-arch-universal2-cxx17 macos-12	1m 44s
xxHash ios-nocodesign-15-5-arm64-cxx17 macos-12	1m 58s
xxHash ninja-vs-16-2019-win64-cxx17 windows-2019	1m 21s
xxHash nmake-vs-16-2019-win64-cxx17 windows-2019	1m 44s
xxHash vs-16-2019-win64-sdk-10-0-18362-0-cxx17 windows-2019	2m 21s
xxHash vs-16-2019-win64-store-10-cxx17 windows-2019	3m 34s
xxHash mingw-cxx17 windows-2019	39s
xxHash msys-cxx17 windows-2019	2m 52s
set_status	0s
	23m 33s

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