Add demos from Allwinner SDK to Lindinos

[jonsmirl]

For new users it would be convenient if all of the demo apps from the Allwinner V5 SDK were included in the OS download. Put them in a folder on the desktop so that they will be obvious to new users.  Everyone likes a whiz-bang demo when they first open a new toy.

[Michael]

Thanks for your suggest

[derekvalleroy]

Agreed. Are the demos located somewhere else? 

I'm new and would like something to start with.

[jonsmirl]

They are on github
https://github.com/lindenis-org/mpp_sample