Do not work on STM32L0 (thumbv6m)

[romixlab]

Simply no output, maybe some one might have an idea why could it be. Another piece of the puzzle is this library - https://github.com/wez/jlink_rtt which works just fine. I even tried to flash rtt-target based firmware first and then without closing rttviewer flashed jlink_rtt one, and it worked. So maybe init part is fine, but then actual writing seems to be pretty much the same (ptr::copy vs ptr::copy_non_overlapping). Or rttviewer just rescans the RAM after reset and it doesn't mean anything.