Severin Teona - SAOC Milestone 2 Update 2 - Druntime for Microcontrollers

[Severin Teona]

Hello guys!

My last post is at [1]. For this week I planned to:
- link the druntime with some empty implementations
- emulate an application that uses that druntime.

Unfortunately, I have not managed to complete all my tasks, 
mostly because some of the `undefined referece` errors gave me a 
hard time.

I still have a few errors I have to solve, so this week's plans 
remain the same:
- finish the linking process
- emulate an application

[1]: 
https://forum.dlang.org/post/wwvotjckyihuvvhxscha@forum.dlang.org