Revert "Link to libsnapshot_cow where libsnapshot is linked." am: 300a8eb122 am: d46ed87737 am: 4d516c648f

Original change: https://android-review.googlesource.com/c/platform/system/update_engine/+/1447801

Change-Id: I01c423632ecfae6a4c18fe349be175dd07a5c64d