stm32: add new OpenOCD script
stm32: add new OpenOCD script

Closes #165

forGGe/theCore,forGGe/theCore,forGGe/theCore,forGGe/theCore,RostakaGmfun/theCore,RostakaGmfun/theCore,RostakaGmfun/theCore,RostakaGmfun/theCore