ryu: update kernel prebuilt
am: 1f719a46d7

Change-Id: I1ae33de6006cb81ab01e5dd26e7ff930d9b6e622
tree: 8663c64fbf9efeee9687cc4b5c24b562ab8711f5
  1. Image.fit
  2. Image.fit.kasan
  3. push-kernel.sh