examples/accel: Added serial pads define to Makefile
examples/accel: Added serial pads define to Makefile

mtusnio/LetMeCreateIoT,mtusnio/LetMeCreateIoT,CreatorDev/LetMeCreateIoT,CreatorDev/LetMeCreateIoT,mtusnio/LetMeCreateIoT,mtusnio/LetMeCreateIoT,CreatorDev/LetMeCreateIoT,CreatorDev/LetMeCreateIoT