Modified Makefile to be able to build STM32 platform.
Added some basic configuration files and gcc config files as well as a modified kernel-post Makefile for STM32F4 platform. Now we are able to build files contained in the sys/stm32/baremetal folder. Now this would be a really good starting point to think about a memory map for ARM Cortex core.
Merge branch 'master' of https://github.com/thebaron06/retrobsd