Add CRC32 detection to arm32 #830
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armv8 has 32-bit mode, but it can use crc32 instruction sets even if 32-bit.
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Cortex-A53 etc has 32-bit mode, and it can use crc32 instruction sets even if 32-bit (A32 mode) and CPU is supported. So we should add crc32 detection for arm32.