Find7: Add IPC Security config

Change-Id: I09995c304bd2311af6b343505ce482f44888bf37
Find7: move sec_config out of ramdisk

/system/etc is symlinked to /etc on boot, no need to clobber the ramfs

Change-Id: I51c76c28cac4e939662783ece88ef8ca078ef1c4