Adding build support for the ModalAI VOXL 2 platform

[katzfey]

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Describe problem solved by this pull request

This is the first pull request to add support for the ModalAI VOXL 2 single board computer.

Describe your solution

This is the bare minimum of code to test the build environment for VOXL 2

Test data / coverage

A simple "Hello World" message output shows that PX4 is running