ext: hal: stm32cube: HAL/LL static library for stm32f0xx v.1.9.

The commit delivers HAL/LL static library source files for STM32F0 SoC.
Using STM32Cube provides generic access to all families, maximizes
code reuse across different STM32 families and helps taking benefits
of a mature SDK.

Origin: STM32Cube
URL: http://www.st.com/en/embedded-software/stm32cubef0.html


Purpose: Introduction of STM32F0xx STM32Cube definitions
and Abstraction Layers
Maintained-by: External

Original STM32Cube tree structure has been modified to a minimum
structure for a better fit into Zephyr. HAL is split into 2 parts:
-driver: initially Drivers/STM32F0xx_HAL_Driver, contains HAL and LL
-soc: initially Drivers/CMSIS/Device/ST/STM32F0xx, contains stm32f0xx
SoCs header files.

Fixes #3923

Signed-off-by: Maciej Debski <maciej.debski@rndity.com>
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>