Build pTOS for Asus C201 Chromebook

[paulwratt]

Well it looks like I wont have to buy a Gemini PDA after all, as according to the following link, some work is being done right now on the Asus C201 Chromebook, and RK3288 based arm7l processor, so it is able to alternate boot without the possibility of bricking the unit.

https://github.com/Miouyouyou/RockMyy/issues/3

I will look into this as soon as I have BOTH the armv6 RPi B and armv7 RPi 2B+ booting to the pTOS desktop, like this:

https://github.com/kelihlodversson/pTOS/issues/3#issuecomment-410445677