References are better for array args

.travis.yml

Marlin/src/feature/bedlevel/ubl/ubl.h

Marlin/src/feature/bedlevel/ubl/ubl_motion.cpp

Marlin/src/gcode/bedlevel/G26.cpp

Marlin/src/gcode/host/M114.cpp

Marlin/src/gcode/motion/G2_G3.cpp

Marlin/src/gcode/motion/G5.cpp

Marlin/src/module/motion.cpp

Marlin/src/module/planner.cpp

Marlin/src/module/planner.h

Marlin/src/module/probe.cpp

Marlin/src/module/stepper.cpp

Marlin/src/module/stepper.h