build: use 'echo -n' instead of 'cut -z'
build: use 'echo -n' instead of 'cut -z'

because of Ubuntu does not support `cut -z`

Signed-off-by: Alexander Kuleshov <1e54dc1c299571bb7a58e37a7ea31ffd91d38f4e@gmail.com>

0xAX/tmail,0xAX/tmail,0xAX/tmail