getconf: add NPROCESSORS_CONF and NPROCESSORS_ONLN.

New (https://austingroupbugs.net/view.php?id=339) names for the
existing _NPROCESSORS_CONF and _NPROCESSORS_ONLN.

toys/posix/getconf.c

@@ -99,7 +99,8 @@ static struct config sysconfs[] = {
   CONF(BC_STRING_MAX), CONF(CHILD_MAX), CONF(CLK_TCK), CONF(COLL_WEIGHTS_MAX),
   CONF(DELAYTIMER_MAX), CONF(EXPR_NEST_MAX), CONF(HOST_NAME_MAX),
   CONF(IOV_MAX), CONF(LINE_MAX), CONF(LOGIN_NAME_MAX), CONF(NGROUPS_MAX),
-  CONF(MQ_OPEN_MAX), CONF(MQ_PRIO_MAX), CONF(OPEN_MAX), CONF(PAGE_SIZE),
+  CONF(MQ_OPEN_MAX), CONF(MQ_PRIO_MAX), CONF(NPROCESSORS_CONF),
+  CONF(NPROCESSORS_ONLN), CONF(OPEN_MAX), CONF(PAGE_SIZE),
   CONF(PAGESIZE), CONF(RAW_SOCKETS), CONF(RE_DUP_MAX), CONF(RTSIG_MAX),
   CONF(SEM_NSEMS_MAX), CONF(SEM_VALUE_MAX), CONF(SIGQUEUE_MAX),
   CONF(STREAM_MAX), CONF(SYMLOOP_MAX), CONF(TIMER_MAX), CONF(TTY_NAME_MAX),