procd: allow usage of * as procd_running() instance parameter

service_running() implementation in /etc/rc.common use it.
It is preferable to use wildcard than assuming the instance
name is the default one.

jsonfilter returns all matches when wildcards are used, hence
the -l 1 argument used to limit output to only one value.

Signed-off-by: Alin Nastac <alin.nastac@gmail.com>