init: Fix a bug in the WaitToBeReaped() logging code

Only report status information for the processes that are still running.
Additionally, make the logging output look better by starting the
process information from /proc start on a new line.

Fixes: ea595ba2 ("init: Log more information if stopping times out")
Change-Id: I3c882c364f11278087a78efb7a8e8fee8e582417
Signed-off-by: Bart Van Assche <bvanassche@google.com>