cmake HAVE_MM256_EXTRACT_EPI64 examples

pingcap/tiflash contrib/aws-cmake/AwsSIMD.cmake :40 

check_c_source_compiles("
        #include <immintrin.h>
        #include <string.h>

        int main() {
            __m256i vec;
            memset(&vec, 0, sizeof(vec));
            return (int)_mm256_extract_epi64(vec, 2);
        }" HAVE_MM256_EXTRACT_EPI64)

ByConity/ByConity contrib/aws-cmake/AwsSIMD.cmake :37 

check_c_source_compiles("
        #include <immintrin.h>
        #include <string.h>
        int main() {
            __m256i vec;
            memset(&vec, 0, sizeof(vec));
            return (int)_mm256_extract_epi64(vec, 2);
        }" HAVE_MM256_EXTRACT_EPI64)