Rename _() macro to _SSE2NEON() to avoid conflict with gettext #398

Job	Run time
host-x86 (x86_64, g++)	2m 39s
host-x86 (x86_64, clang++)	1m 14s
host-win (armv7)	47s
host-win (aarch64)	48s
host-win (x86_64)	44s
host-win-msvc	1m 2s
coding-style	18s
host-arm (aarch64, none, none, g++)	3m 1s
host-arm (aarch64, none, none, clang++-15)	4m 0s
host-arm (aarch64, crypto+crc, none, clang++-15)	4m 16s
host-arm (armv7, none, none, g++)	3m 11s
host-arm (armv7, none, -mcpu=cortex-a32 -mfpu=neon-fp-armv8, g++)	3m 21s
host-arm (armv7, none, -mcpu=cortex-a32 -mfpu=neon-fp-armv8, clang++-15)	4m 31s
host-arm (armv7, none, none, clang++-15)	4m 3s
host-arm (aarch64, crypto+crc, none, g++)	2m 47s
test-win-msvc	1m 9s
	37m 51s

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