Merge pull request #652 from rouault/_MM_SHUFFLE2 #315

Job	Run time
host-win-msvc	1m 38s
coding-style	11s
host-arm (armv7, none, none, g++-10)	3m 22s
host-win (x86_64)	46s
host-arm (armv7, none, none, clang++-11)	3m 36s
host-win (armv7)	44s
host-x86 (x86_64, g++-10)	2m 7s
host-arm (aarch64, none, none, g++-10)	2m 54s
host-win (aarch64)	44s
host-x86 (x86_64, clang++-11)	29s
host-arm (aarch64, none, none, clang++-11)	3m 31s
host-arm (aarch64, crypto+crc, none, g++-10)	2m 49s
host-arm (aarch64, crypto+crc, none, clang++-11)	3m 26s
host-arm (armv7, none, -mcpu=cortex-a32 -mfpu=neon-fp-armv8, g++-10)	3m 23s
host-arm (armv7, none, -mcpu=cortex-a32 -mfpu=neon-fp-armv8, clang++-11)	3m 28s
test-win-msvc	46s
	33m 54s

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