ryu: update kernel prebuilt[ DO NOT MERGE ] am: 6f44c5d6ca  -s ours am: f6a16b9530
am: 397f6f4d60

Change-Id: I388305e4014c0369a8c50f475a3d7766bd219605
tree: dcd71f9f06006ebc7adf756c2929922ea41c48cc
  1. Image.fit
  2. Image.fit.kasan
  3. push-kernel.sh