Remove some unwanted packages

Change-Id: I583961b29038b0ca4fa398c0dd0704737e2e01d8
otasigcheck and backuptools from CM

Change-Id: I1b582d57ed58176db83ec046e68884cd9e4a1b6a

Add otasigcheck.sh from cm

Change-Id: I930b06ccd1d8fc2b10bdb5e98418efb05ca28e71