Don't forget to umount rootfs in case we bail on firmware re-signing.

TEST=manual + independently verified by drewry@

1) Extract rootfs from the original image.
2) run tune2fs -l <original rootfs> on it. Observe filesystem features has no "needs_recovery"
3) run
4) Extract new rootfs
6) run tune2fs -l <new rootfs>. "needs_recovery" should still not be there (it was before this fix)

Change-Id: I3a03245886844d3dbfe1f8b2b73ce624ec67808f

Review URL:
1 file changed