crypto/nacl.py: make paths relative to the file itself
crypto/nacl.py: make paths relative to the file itself

Oncilla/scion,FR4NK-W/osourced-scion,dmpiergiacomo/scion,dmpiergiacomo/scion,dmpiergiacomo/scion,netsec-ethz/scion,klausman/scion,klausman/scion,Oncilla/scion,netsec-ethz/scion,dmpiergiacomo/scion,FR4NK-W/osourced-scion,Oncilla/scion,netsec-ethz/scion,dmpiergiacomo/scion,dmpiergiacomo/scion,klausman/scion,Oncilla/scion,klausman/scion,FR4NK-W/osourced-scion,FR4NK-W/osourced-scion,netsec-ethz/scion,klausman/scion,FR4NK-W/osourced-scion