[Android One] 6.Update kernel

Step 1. Reboot your Phone into the bootloader.

~/sprout/cm11$ adb devices
List of devices attached 
V00xxxxxxxxxxxxxxxxxx device

~/sprout/cm11$ adb reboot bootloader

Step 2. download kernel

~/sprout/cm11 $ out/target/product/sprout$ fastboot flash boot boot.img
target reported max download size of 134217728 bytes
sending 'boot' (5200 KB)...
OKAY [  0.821s]
writing 'boot'...
OKAY [  0.503s]
finished. total time: 1.324s
~~/sprout/cm11$ /out/target/product/sprout$ fastboot reboot
rebooting...