am 4012c0a4: Merge "remount / as read-only only on post-fs to allow per-target config of /" into gingerbread

Merge commit '4012c0a46ab2ebdf6a1298bc4e85ed3368d1b8a4' into gingerbread-plus-aosp

* commit '4012c0a46ab2ebdf6a1298bc4e85ed3368d1b8a4':
  remount / as read-only only on post-fs to allow per-target config of /