minor improvement to make sysinit_run a constructor, so don't need
to manually call it anymore...

This required updating the linker script for the l1 part to include
the linkerset section..

convert to using stdio to line buffer usb output... This reduces
usb traffic like when doing hexdump...

The delay works, but could be a problem on slower systems...  It's
been reported, so hopefully a fix will happen..

Before this, I was VERY frequently having to retry..  changing just
the gw improved things significantly, but changing it on both results
is no observable retries..  This is also the default that the example
apps in loramac uses..

eliminate the strobe code as it isn't used, this just pushes
packets back and forth..

3-4 seconds to gather all this...  need to add a blinking light to this
so it's clear that it's still starting..

This is better than using RAM, as it keeps the state between power
cycles...

all working...