Merging assemblies of different platforms.

I do not impose, this is only a proposal for discussion. What would users have a single point of entry into the build system (the main armbian GIT/build), I propose to add into the main master branch additional variable that will be used in the script "compile.sh" to specify what branch to use when building. This will allow to quickly combine the main branch to build images Armbian with my fork for assembling the images for TV boxes and boards based on the Amlogic platform. Under the add , my changes do not conflict with the existing system in the main branch and at the same time, users will be able to collect their own versions based on the amlogic branch of a single GIT. By the way, if to take out from the main branch all the specific elements responsible for supporting a specific platform (Rockchip Allwiner etc) in a separate branch, it will simplify maintenance of the Central build system, it will be the same for everyone. And specific elements from different platforms will not disturb others.

https://github.com/150balbes/build/blob/master/config/templates/config-example.conf#L25

https://github.com/150balbes/build/blob/amlogic/config/templates/config-example.conf#L26

https://github.com/150balbes/build/blob/master/compile.sh#L49