otasigcheck and backuptools from CM

Change-Id: I1b582d57ed58176db83ec046e68884cd9e4a1b6a

Add otasigcheck.sh from cm

Change-Id: I930b06ccd1d8fc2b10bdb5e98418efb05ca28e71
Bootanimation RC1 by Cristian Giordano

Best way to get feedback on this is by including it in our alphas.

Change-Id: I6238d01b8bb957e11d2463b4fa69eab50602e30b