The 'umcumgr' is a simple command line tool for MCU firmware management
over MCUmgr/SMP protocol. It will be used together with MCUboot running
on the on-board (or external, e.g. in form of a dongle) MCU.
While at it, add also dedicated 'mcu.yml' profile file.
Signed-off-by: Piotr Dymacz <pepe2k@gmail.com>
