Request: Build on aarch64

[K2IE]

Rather than run the arm dependent code under qemu on an x86 or on an RPi, I see potential advantage for being able to run some of these tools on an aarch64 Debian host. If this is not a heavy lift please consider.

[nivex]

The problem is the DMR and YSF transcode modes depend on a binary blob vocoder that is extracted from a device running a 32-bit ARM CPU. Since there's no source, it cannot be rebuilt for ARM64.