init/reboot: call MNT_FORCE at the last umount(2)

The last one will avoid errors=panic in ext4.

Test: Build
Bug: 63981945
Bug: 65481582
Change-Id: I9c86afcce441767e24fc43668ab1ff6230155a9f
Signed-off-by: Jaegeuk Kim <jaegeuk@google.com>
1 file changed