ota_from_target_files: add automagic.sh: a shell script for CAREFUL data modification to automagically prevent issues for dirty flashers

Change-Id: Iba113c0f42ad390f87886d18916f5bde547a5fc2
Merge branch 'L5' of https://github.com/VanirAOSP/build into EXODUS
Merge pull request #5 from VanirAOSP/EXODUS

Exodus