create target device description

[gfursin]

I started working on a module 'device' that should be used to describe avialable target platforms where we can remotely run workloads on (and possibly compile program if supported). For now, device description will be added manually including target_os, target_device_id (for Android devices).

Importantly, we should also agree on how to describe remote access (i.e. if it's via ADB, SSH, on even CK for Windows-based devices).

Then we will need to update 'program' module from ck-autotuning to take '--target={device UOA}' as an input and then prepare all necessary steps to compile and run program for this device ...

I expect we will need to discuss implementation detail more ...

[gfursin]

I have now implemented basic functionality. Now adding its support to "program" module ...