cmake AWS_HAVE_ARM32_CRC examples

awslabs/aws-c-common cmake/AwsSIMD.cmake :94 

check_c_source_compiles("
            #include <arm_acle.h>
            int main() {
                int crc = __crc32d(0, 1);
                return 0;
            }" AWS_HAVE_ARM32_CRC)