[automerger skipped] Allow non-existing fstab.postinstall am: 4b28a53926 am: f1f1b77196 -s ours

am skip reason: Change-Id I8569d72c03a260bd1be9dcccb5b9ae670117179c with SHA-1 93cde30635 is in history

Change-Id: Ia52df33c94e7dc26bb02ba590fc9ddc02df296a6