Fix minor typos in the sse2neon header #152

Job	Run time
coding-style	11s
host-arm (armv7, none, none, g++-10)	3m 15s
host-win (x86_64)	52s
host-arm (armv7, none, none, clang++-11)	3m 30s
host-win-msvc	1m 4s
host-win (armv7)	1m 3s
host-x86 (x86_64, g++-10)	2m 7s
host-arm (aarch64, none, none, g++-10)	2m 43s
host-win (aarch64)	47s
host-x86 (x86_64, clang++-11)	24s
host-arm (aarch64, none, none, clang++-11)	3m 24s
host-arm (aarch64, crypto+crc, none, g++-10)	3m 5s
host-arm (aarch64, crypto+crc, none, clang++-11)	3m 42s
host-arm (armv7, none, -mcpu=cortex-a32 -mfpu=neon-fp-armv8, g++-10)	3m 18s
host-arm (armv7, none, -mcpu=cortex-a32 -mfpu=neon-fp-armv8, clang++-11)	3m 21s
test-win-msvc	48s
	33m 34s

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