stm32cube: Add Zephyr build system files for stm32f4 series

Following previous commits, updating build system files in order
to support stm32cube on stm32f4xx series.


Change-Id: Id74779a7cf15f3fdce372bf8710c3f7c4fff4773
Signed-off-by: Erwan Gouriou <erwan.gouriou@linaro.org>
3 files changed