ryu: update kernel prebuilt am: a79c1b7950
am: 2b2ed5aa9f

Change-Id: I5b2ff51dd117cfa4ea5f4c96b170fec51c44dfd6
tree: feb93b758c1b8e55f921a2393d4b34d58d56bd29
  1. Image.fit
  2. Image.fit.kasan
  3. push-kernel.sh