[systemd] Run service only when booting to home screen

Signed-off-by: Matti Kosola <matti.kosola@jolla.com>
[rpm] Install systemd service file to the correct place

Signed-off-by: Matti Kosola <matti.kosola@jolla.com>
Merge pull request #15 from mkosola/master

Fixes to systemd service file