USB-storage: after ACK free Packet_descriptor
base: call proper __cxa_finalize
os: don't close the Rm_connection in ldso

At this point we cannot close the connection anymore because all
mappings are gone and the needed stack is invalid. This is not a
problem since process will be discarded anyway.
gems: provide file to terminal service
os: stand-alone snprintf() for trace-policies
os: add policy for tracing RPC alloc and free
os: trace monitor convinience classes [WIP]
os: provide trace-events via Terminal_session [WIP]
os: trace_terminal runscripts
core: fix iterating over trace policies