Changes to crazyflie for upstream Nuttx and hardfault logging

Images/crazyflie.prototype

cmake/configs/nuttx_crazyflie_default.cmake

nuttx-configs/crazyflie/include/board.h

nuttx-configs/crazyflie/nsh/Make.defs

nuttx-configs/crazyflie/nsh/appconfig

nuttx-configs/crazyflie/nsh/defconfig

nuttx-configs/crazyflie/scripts/ld.script

nuttx-configs/crazyflie/src/Makefile

src/drivers/boards/crazyflie/board_config.h

src/drivers/boards/crazyflie/crazyflie_init.c

src/drivers/boards/crazyflie/crazyflie_usb.c