src/pcp/numastat/pcp-numastat.py: mark popen() usage as safe
src/pcp/numastat/pcp-numastat.py: mark popen() usage as safe

adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp,adfernandes/pcp