Makefile: Update toolchain location

Signed-off-by: Derek Cannata <thederekjay@gmail.com>
Scripts: Update COMPILE_BY/HOST

Signed-off-by: Derek Cannata <thederekjay@gmail.com>
gamma_control: Adjust contrast to my preference.

Signed-off-by: Derek Cannata <thederekjay@gmail.com>
SCHEDULER: Autogroup patch group by current user android UID instead of task ID