procname_kill(): Fix possible resource leak and let's use opendir() errno
procname_kill(): Fix possible resource leak and let's use opendir() errno

Signed-off-by: Joachim Nilsson <583c295fd7602c168ad814279bbc3894ba65f5d6@gmail.com>

troglobit/finit,westermo/finit,troglobit/finit,westermo/finit