[Open_electroporator] pyflex_f401 v0.5 --> v0.6 testing

[John Griessen]

openocd says verify is good, and from some of their devs that is really done with checksums and means it
really accepted and saved and returned data, but not making blinky lights still.  So now I stop trying to get
micropython to work on my new platform and go to C language to get a round trip of write blinky code, load, see lights flash.

I'll be using this:   https://github.com/karlp/libopencm3-miniblink