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

Change-Id: Idda96f1f80884685b3eb42e6978209255e1beb02
tree: dcd71f9f06006ebc7adf756c2929922ea41c48cc
  1. Image.fit
  2. Image.fit.kasan
  3. push-kernel.sh