[VL] Build velox failed for machines without AVX-512 instruction set

### Problem description

When compiling simdjson for Velox using dynamic compile method, it failed. The detail is as follow:

'vpcompressb' is an instruction of AVX-512 instruction set, see: https://en.wikipedia.org/wiki/AVX-512

But my machine does not have AVX-512, see:

### System information
centos7
Intel(R) Xeon(R) CPU E5-2650

### CMake log

```bash

```