GitLab

Changed ext4 to be 4kb aligned, and fat to be 32kb aligned.
Fixed issue that could potentially cause unencrypted ext4
ASECS to overwrite the ASEC super block when filled.

Change-Id: I890426c82ac9cbc65add85a8e3f5063504193c31
Signed-off-by: Daniel Rosenberg <drosen@google.com>