test: cleanup
test: cleanup

- u3s_cue_xeno_init_with to after u3m_boot_lite().

- c3__ux for overflow case for more intuitive test output.

- "test boot" in final output.

ngzax/urbit,ngzax/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,urbit/urbit,urbit/urbit,urbit/urbit,ngzax/urbit,ngzax/urbit,urbit/urbit,urbit/urbit,urbit/urbit,ngzax/urbit