src/pmlogconf/pmlogconf.c: fix OpenBSD 6.7 compiler warning
src/pmlogconf/pmlogconf.c: fix OpenBSD 6.7 compiler warning

When sscanf'ing a pmAtomValue with the ll or ull member, use
PRId64 or PRIu64 as the format specifier.

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