[aml] add support s806 (s812)to project
add unrar package
add mc package
add slang package
recovery_reboot
add OEM to build
enable OEM support
update busybox config (add colorterm=linux)
[aml] update project S806
rename project S806S to S806
Merge branch 'openelec-5.0-dev-s806s' into openelec-5.0-dev