title: Make persistent changes to init.rc
body: <p>I want to change the <code>init.rc</code> file of an android pad. But after I change it and reboot the system, the original <code>init.rc</code> comes back.</p>
  
  <p>How can I make the change to the <code>init.rc</code> persistently without rebuild the system (since I don't have the source code of the system)? Or is there any way to work around?</p>