add thread_create/thread_exit debugging output
add thread_create/thread_exit debugging output

xndcn/moboot-for-veer,jcsullins/moboot,jcsullins/moboot,jcsullins/moboot,xndcn/moboot-for-veer,xndcn/moboot-for-veer,jcsullins/moboot,xndcn/moboot-for-veer,xndcn/moboot-for-veer,jcsullins/moboot,jcsullins/moboot