Revert "Revert "releasetools: Allow using futility-host to sign old TF.zip."" am: 77620b5a45 am: 9eea2cde67 am: 8fa3351890 am: dce7c28f7c
am: 869793b198

Change-Id: I9e060501f29dd96c6d1bd4d004a09db2c643e7f7