refactor moto omap4 ss bits

Change-Id: I0792ba853eb171cec0026161aade1db2bd0808f2
update build scripts

Change-Id: Ib44c6c115cc9810bed3dcdda486b9e42e1d63668
cleanup safestrap.mk include file

Change-Id: I5f921fdff4007a1918b0cb3753d35efbdabe374e
add custom recovery.fstab for moto omap4

Change-Id: If20197ba1bed9f218566cce7ebcd6092b8146c1a