tree 347a1ae1a13e978bd485dadf31dc60d6d61a6d13
parent 16b5fd7480ae2706584cdbc84c2650a836f82b5a
author Lorenzo Colitti <lorenzo@google.com> 1399805043 +0900
committer Lorenzo Colitti <lorenzo@google.com> 1422866848 +0900

If there's a new root fs, delete the old one

Otherwise xz will refuse to overwrite it. Explicitly delete it
instead of passing -f to xz because that also forces a lot of
other things, not just file overwrite.

Change-Id: Iec3c73c9ae4775039eb9c3afed91bfaa4ebedb5d