scripts: single style for command substitution in systemd-autofs-restart.sh
scripts: single style for command substitution in systemd-autofs-restart.sh

Let's use $(...) form, it is more readable, and used in other places.

Signed-off-by: Eugene Kolomeetz <e13ac15a30aaa8c841b369b1e0ca4d4d79ffd8cf@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <c9a32589e048e044184536f7ac71ef92fe82df3e@virtuozzo.com>

eabatalov/criu,KKoukiou/criu-remote,efiop/criu,eabatalov/criu,eabatalov/criu,KKoukiou/criu-remote,efiop/criu,KKoukiou/criu-remote,efiop/criu,KKoukiou/criu-remote,KKoukiou/criu-remote,KKoukiou/criu-remote,efiop/criu,efiop/criu,efiop/criu,eabatalov/criu,eabatalov/criu,eabatalov/criu