Dehardcode x86_64 ARCH to build VPP libraries used for `accel-ppp-ng` [[ https://github.com/vyos/vyos-build/blob/9d533529aacd33b0f47c49607c628aa3c3f3ca3a/scripts/package-build/linux-kernel/build-accel-ppp-ng.sh#L6-L7 | build ]]
```
Failed to build package accel-ppp-ng: Command '['./build-accel-ppp-ng.sh']' returned non-zero exit status 1.
```