Adapt the script printout to 32 characters lines

Our devices have only 32 characters long lines in recovery,
so get adapted to this fact.

Patch-set 2: added some thanks and an "installing",
so user knows it's doing something actually.

Signed-off-by: utak3r <piotr.borys@gmail.com>
Change-Id: Ia1827b1dc94a23a8ea98ff2192a530567ee2da88