Signed-off-by: Damien George <damien@micropython.org>
The default stm32lib remains lib/stm32lib, but it can now be easily overriden at build time by specifying STM32LIB_DIR, or STM32LIB_CMSIS_DIR and STM32LIB_HAL_DIR. Signed-off-by: Damien George <damien@micropython.org>