[all] Don't use kill 9 so fast. Contributes to fixing modem reset reboots

Signed-off-by: Pekka Lundstrom <pekka.lundstrom@jollamobile.com>
Signed-off-by: Simonas Leleiva <simonas.leleiva@jollamobile.com>
Merge pull request #25 from sledges/fix

Don't use kill 9 so fast. Contributes to fixing modem reset reboots