Merge "Revert "releasetools: Allow using futility-host to sign old TF.zip."" into nyc-dev am: b0df1ef7ac am: 983c979c25 am: bd6d03ab18 am: e64f52ebcd
am: 55f185e0a4

Change-Id: Ic47af33906d2ead19cc3b6346f1aa55e5de5952d