sysctl.conf from http://forum.xda-developers.com/showthread.php?t=1621808 and http://forum.xda-developers.com/showthread.php?t=1346680

Change-Id: Iea9a4625c03dce792a6d3d8b4508f3ffad31f801
test overlays

Change-Id: I59f77116f9efe8ae504eb859c41e5461583bb0b5