add support for NI Linux RT targets

Currently it says that all OS are supported but some dependencies do use a few VIs from the vi.lib that are "Windows only"
(VI to set the cursor busy and VI to get default Windows path to find the Position)

I think the amount of work is limited to simply adding disable structure that depend on the OS, it would be very nice it these changes were made, I could then use my MGI Panel based DQMH module also on Linux RT.

Cheers