This is the first working example code which is tested on hardware.
The LED on the Olimex STM-H103 eval board is happily blinking.
We use a dummy "delay" function (basically a busy-waiting for-loop), which
will only work if you use -O0 in CFLAGS (-O2, -O3, or -Os will not work as
the compiler optimizes the loop away).
We use some arbitrary value for stack size (2 KB) and use main()
directly as the reset vector function. This will change later.
Also, we do the GPIO and clock init as well as the GPIO toggling for the
LED blinking fully "manually" for now, but there may be more higher-level
functions for doing that at some later date.
This is intended as a small blink example for the Olimex STM32-H103 board.
It doesn't do anything useful (yet), but it builds fine.
There's a sample Makefile and a preliminary ld script (which probably
needs some more work).
